Firm Profile > CMS Cameron McKenna Nabarro Olswang Posniak i Bejm sp.k. > Warsaw, Poland

CMS Cameron McKenna Nabarro Olswang Posniak i Bejm sp.k.
00-113 WARSAW

Poland > Competition/antitrust Tier 1

CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k.'s team is well-integrated into the firm's global competition and EU law practice group. It advises on the spectrum of competition law issues, handling state aid and public procurement matters on top of its traditional merger control, antitrust compliance and competition authority investigations work. Leading the department is Małgorzata Urbańska, who is 'one of the best' competition lawyers in Poland according to one client. Senior associates Agnieszka Starzyńska and Izabela Biernat-Sadlak are noted for their experience in merger control proceedings.

Practice head(s):

Małgorzata Urbańska

Other key lawyers:

Agnieszka Starzyńska; Izabela Biernat-Sadlak; Krzysztof Sikora


‘Very skilled lawyers with an in-depth knowledge of Polish competition/antitrust law and also with knowledge of other legal systems and insights in how competition authorities in Poland and other countries work. ’

‘Izabela Biernat-Sadlak is a very competent and skilled lawyer with profound knowledge of the Polish legal system and especially competition/antitrust law. Her support is very valuable, she delivers always timely and efficiently.’

‘High responsiveness of the team, very good sector knowledge, practical solutions’

‘Krzysztof Sikora is up and coming. Małgorzata Urbańska is one of the best in Poland.’

Key clients

PZ Cussons

Grupa Azoty Polyolefins

P4 (Play mobile operator)

Bombardier Transportation

Bayerische Motoren Werke (BMW)

Japan Tobacco International (JTI)




Groupe CAT

Panattoni Development



Beckton Dickinson




Poland > Construction Tier 1

The construction practice at CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k. is led by 'exceptional' disputes expert Lidia Dziurzyńska-Leipert. Acting for clients such as Allianz Real Estate and Lufthansa/GE, the substantive team advises on all key aspects from project implementation through to completion. Notably, the firm recently assisted the consortium working on the Łódź Fabryczn railway, which has included representing the client in high-value litigation following substantive delays. In addition, it handled key lawsuits connected to the transfer of completion duties at the City Stadium in Wrocław. Michał Bork is a key name for investment law matters.

Practice head(s):

Lidia Dziurzyńska-Leipert

Other key lawyers:

Michal Bork


‘The firm works efficiently and timely. It is specialised in different law categories, which enables holistic resolution of more complicated issues that require cooperation of different competences.’

‘Lawyers employed in the firm are very available and engaged, dedicate enough time to the client, they have in-depth knowledge of law matters. While collaborating we appreciated the cooperation especially with adv. Michal Bork and adv. Lidia Dziurynska-Leipert, who we consider to be exceptional professionals. ’

‘Good knowledge of the market and experience gained in complicated cases that are key in the construction industry. ’

‘Michal Bork is an expert for all matters related to FIDIC construction contracts. His wealth of experience is instrumental to deal with our general contractor and to bring the project to an successful end commercially and legally.’

‘This law firm provides services at a very high level. The company’s lawyers answer questions comprehensively. Especially when it comes to international issues.’

‘The people with whom I worked showed professionalism and knowledge. They were always available. They kept their deadlines, which is not so obvious in other lawyers.’

Key clients



Max Bögl

Trakcja PRKil S.A.



GMP Architekten

SBP schlaich bergermann partner


TR Warszawa

Allianz Real Estate

Poland > Dispute resolution Tier 1

The dispute resolution group at CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k. has a strong financial institution focus, as well as an active construction disputes practice. Other areas of expertise include contentious energy, aviation, life sciences, automotive and TMT issues. The team is often called on in arbitrations, where department head Małgorzata Surdek, who is a member of the ICC International Court of Arbitration in Paris, is a key name. Anna Cudna-Wagner is the name to note for banking disputes, while Arkadiusz Korzeniewski is a key name for white-collar criminal defence.

Practice head(s):

Małgorzata Surdek

Other key lawyers:

Anna Cudna-Wagner; Arkadiusz Korzeniewski; Katarzyna Kucharczyk; Joanna Młot; Marcin Zbytniewski


‘Deeply involved and dedicated to the cases. Excellent procedural and infrastructural experts and very good negotiators. Very good value for money. Unique approach as for the feedback to the client.’

‘Marcin Zbytniewski, Adam Jodkowski – all are experts in the area of the civil procedure, very good contact with the client and focused on the client’s objectives.’

‘Apart from the strong knowledge and legal experience which is obvious, CMS’ team has strong communication skills enabling them to clearly explain the developments in the case and next planned steps as well as possible outcomes and chances.’

‘Mrs. Katarzyna Kucharczyk – excellent friendly cooperation backed up by professionalism, hard work and legal knowledge Mr. Mariusz Minkiewicz – diligent, meticulous and hard working as it seems almost 24/7’

‘The highest quality in Poland’

‘Malgorzata Surdek is a luminary, Katarzyna Kucharczyk is up and coming, very reliable.’

‘A well-oiled machine, superbly headed-up by the outstanding Malgosia Surdek. Their ability to crunch through masses of technical detail and from that to develop superb legal argument with flawless attention to detail is world class. ’

‘Malgosia Surdek is a superstar – both a brilliant lawyer and a fantastic strategist. She inspires and deserves the utmost confidence, delivering a superb game plan and is always on top of the issues, whatever they may be. She is a tough litigator and pursues her clients’ interests relentlessly whilst managing expectations wisely and sensibly. Malgosia is very ably assisted by a great team of associates – Aleksander Woźniak in particular is one to watch as an up-and-coming top litigator. Complementary to their clinical precision, fantastic productivity and drive to succeed, both Malgosia and Alex are tremendously personable. ’

‘The CMS team is every time focussed on the right strategy for the company. The team got quickly into the cases and acquired also an in-depth knowledge of the technical background of the cases to defend the company best. Every time with a hands-on mentality that fits the company.’

‘Malgorzata Surdek is an extremely professional and strategic business partner. Well connected in the legal industry and every time convincing in her standing towards clients, courts and other litigation parties.

‘Each team member is very professional and always well prepared in details even if those details are very unique and in most cases very technical and complicated. Team is also very oriented on deadlines prepares all requested documents on time, even if there are obstacles on client’s side.’

Malgorzata Surdek – very professional, thinking out of box, reads opponents’ positions and points, always brings good ideas and looks for efficient solutions

Key clients

ALE Heavylift B.V. (Mammoet)

Arcadis Sp. z o.o.

AXA Life and AXA Non-Life

Bank Handlowy w Warszawie S.A. (Citibank Group)

Bank Ochrony Środowiska

Bombardier Transportation

BPH Bank (GE Group)

Eiffage Polska Budownictwo S.A.


mBank (Commerzbank Group)

Millennium Bank (BCP Group)

Mostostal Warszawa S.A. (Acciona Group)

PKO Bank (the biggest retailer’s bank in Poland)

Polskie Koleje Linowe (PKL)

Schuler Pressen and Schuler Poland (Schuler / Andritz Group)


Wallstein Rothemühle Sp. z o.o.

VIG Makina

Poland > Employment Tier 1

The employment practice at CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k. is led by 'top-class strategistKatarzyna Dulewicz. The team handles trade union negotiations, employee capital pension schemes and restructuring, among other matters. Particular areas of expertise are finance (where it regularly deals with salary disputes) and retail where Primark and Hermes are key clients. Senior associate Maciej Andrzejewski and associates Tomasz Sancewicz and Agnieszka Kałwa are other important contacts.

Practice head(s):

Katarzyna Dulewicz

Other key lawyers:

Maciej Andrzejewski; Tomasz Sancewicz; Agnieszka Kałwa


They possess deep knowledge of Polish employment legislation and the retail sector.

They understand our business really well and stick to the ‘business first’ rule when preparing legal advice. They are ‘fresh souls’ staying away from outdated legal language and practice. They flexibly adjust to the client’s preferred ways of working.

They have a wide range of expertise, promptness in taking on research and activities, professionalism, approachability and agility.

Katarzyna Dukewich stands out for her coordination role between the different CMS branches. Agnieszka Kalwa is notable for her support during the company set-up.

Katarzyna Dulewicz – a top-class strategist able to put it into tactics; great communicator using both legal and business argumentation; positive person spreading good energy. Tomasz Sancewicz – able to build highly practical advice based on very comprehensive legal knowledge; strong business acumen; very precise in communication; asks great open questions to investigate the matter thoroughly.

Tomasz, Michal and Katarzyna – they are a great team supporting the customer on a daily basis with deep understanding of both professional advice and customer needs.

I have been working with Katarzyna Dulewicz & Tomasz Sancewicz for almost 5 years now. I always appreciate their practical approach, openness and common sense.

Key clients

Goldman Sachs

PZ Cussons




Bank Pekao

Associated British Foods





Universal Music

Polski Fundusz Rozwoju

Axel Springer

Becton Dickinson

Korn/Ferry International

Birkenstock GmbH & Co. KG

Electronic Arts Polska Sp. z o.o.

Poland > Energy and natural resources Tier 1

At CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k., the energy and natural resources team is led by Marcin Bejm. The team advises on the exploration of minerals, industrial investment processes and the parameters of Poland's state aid support system. It also has strength advising on regulatory and trading issues, which includes assistance with negotiating agreements and handling the acquisition of technology licences and EPC contracts. The group is also able to utilise wider expertise in environmental law to assist with climate change covering CO₂ emissions (EU ETS), groundwater contamination, noise and REACH. Tomasz Minkiewicz, Łukasz Szatkowski, Piotr Ciołkowski and Agnieszka Skorupińska are other names to note.

Practice head(s):

Marcin Bejm

Other key lawyers:

Tomasz Minkiewicz, Łukasz Szatkowski; Piotr Ciołkowski; Agnieszka Skorupińska


‘Very responsive team, with good engagement from both associates and partners. Very pragmatic in their approach and quick to identify key issues and identify solutions.’

‘Agnieszka Skorupinska is the best in Poland in that sector and she is close to business. She analyses the case from different perspectives and she is able to connect dots from different areas [tax, administrative, construction, operations] to provide the proper advice. Excellent coordinator for international legal projects (East and Central Europe). ’

‘They have extensive legal knowledge and great understanding of various aspects of environmental protection in many different sectors. They combine high legal standards with a pro-business approach and are able to propose solutions that meet both high standards of compliance with environmental protection law and practical from the business point of view. As a team, they are proactive and responsive. You can count on their advice even in complicated situations.’

‘ I work mainly with Agnieszka Skorupinska and her team. I highly appreciate their legal skills, knowledge and commitment. Agnieszka is a person whose advice you can always count on – both when it comes to finding the best legal solutions and suggestions of a business nature. She is a very proactive, committed person looking for non-standard solutions. I have been cooperating with Agnieszka for many years. During this period, I was involved in various sectors where environmental protection is of key importance and I could always count on her support.’

‘I would like to express my opinion abut Lukasz Szatkowski, the partner I worked on various occasions. Lukasz is a very dedicated person and focused on his tasks. He is also a very open-minded, experienced, and skilful lawyer. What I value most about him is that he is anticipating all sorts of risks, not only from the area of his specialization but as well from other law areas. It is a great pleasure to work with Lukasz and his team. ’

‘They are definitely one of the leading law firms in the energy sector in Poland. I can definitely recommend them.’

Piotr Ciolkowski is one of the sector’s leading individuals. He has a long track record in both market regulation and contracts. I have done one major transaction in the conventional sector with him and it was a very good experience. I also note that he has been very busy with renewables in particular offshore recently‘.

Piotr Ciołkowski – He is an expert in energy regulation. He covers both conventional and renewable energy. I like his business approach to solving legal problems. I think he shall move up in the ranks‘.

Key clients

PKN Orlen SA


Grupa Azoty SA




Polskie Sieci Elektroenergetyczne SA (PSE)

Rafako SA

Polish Development Fund (PFR)

CalEnergy Resources

Central European Petroleum

Rathdowney Resources

Stadtwerke München GmbH

Macquarie Capital/Green Investment Group

MEAG MUNICH ERGO Assetmanagement

Resource Partners

ČEZ Group

Poland > Insurance Tier 1

The team at CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k. is praised by clients for its 'proactive and intuitive approach' to insurance, with 'excellent knowledge of insurance market and regulatory requirements'. The group handles the spectrum of contentious and non-contentious issues; able to draw on substantial experience working with the Polish regulator. In addition to advising on insurance policies, lawyers are also experienced in advising insurance companies on consumer protection issues. The financial services and institutions department is led by 'fully dedicatedEwa Świderska, who is supported by the head of the dispute resolution department Małgorzata Surdek for insurance-related disputes. Senior associate Adam Jodkowski is building a solid foundation in insurance defending insurance claims for financial institutional clients.

Practice head(s):

Ewa Świderska

Other key lawyers:

Małgorzata Surdek; Adam Jodkowski; Sylwia Raszplewicz-Czyżewska; Marta Szwarczyńska


Deep understanding of client needs, curious, searching for non-standard solutions.’

Excellent knowledge of the insurance market and regulatory requirements. In my opinion, the team is capable to deal with unique cases that are impossible to handle for others.

Each time we have a chance to cooperate the team is fully prepared with an outstanding research of the case background.

I work mostly with Ewa Świderska who is fully dedicated to the case each time we have a change to cooperate. Ewa understands business requirements and has a wide legal knowledge.’

Services received reflected a proactive, intuitive approach with a strong focus on task completion under time pressure.’

Key clients





Credit Agricole


Liberty Group




Volkswagen Financial Services


PIB Group Limited

Bank Millennium


Getin Noble Bank

Grupa Azoty Polyolefins

Poland > Investment funds Tier 1

Investment funds are a core competency of the team at CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k., which has an interdisciplinary practice composed of corporate, tax, projects and finance lawyers. Areas of experience include fund structuring, establishments and liquidations, inter-fund transactions and regulatory advice. Jointly leading the team are corporate transactional lawyer Błażej Zagórski and tax structuring specialist Łukasz DynysiukMarcin Bejm is experienced in the use of funds in project and infrastructure settings, while Rafał Zwierz brings heavyweight corporate expertise.

Practice head(s):

Błażej Zagórski; Łukasz Dynysiuk

Other key lawyers:

Marcin Bejm; Rafał Zwierz; Piotr Ciołkowski

Key clients

Polish Development Fund S.A. (Polski Fundusz Rozwoju S.A.)

Fundusz Inwestycji Samorządowych FIZAN


Future Tech FIZAN


MEAG Munich ERGO Asset Management GmbH

Real Assets Advisers


CEE Equity Partners

Abris Capital Partners

Montagu Private Equity

Macquarie’s Green Investment Group

Advent International

Amundi Immobilier

PFR Nieruchomości S.A.

Poland > Public procurement Tier 1

Małgorzata Urbańska leads the public procurement practice at CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k.. The team is known for advising on the competition aspects of consortia formation, the drafting of contracts and the legal aspects of public projects. Representing both authorities and contractors, it also handles the procedural aspects of tenders, competition law, state aid and contentious matters including appeals, white-collar criminal law, bid-rigging and anti-bribery. Marcin Bejm is the name to note for PPP contracts, concession agreements and licence agreements.

Practice head(s):

Małgorzata Urbańska

Other key lawyers:

Marcin Bejm

Key clients

European Investment Bank (EIB)


PZU Group

Bank Pekao SA

Warbud SA (Vinci Group)

Budimex SA

Pojazdy Szynowe PESA Bydgoszcz SA

Centralny Port Komunikacyjny sp. z o.o. (Central Transportation Hub)

Incheon Airport in Seoul

Polskie Sieci Elektroenergetyczne S.A. (PSE)

Local Government Investment Fund (FIS) represented by Polish Development Fund

Górnośląskie Towarzystwo Lotnicze SA

CalEnergy Resources

Polska Grupa Lotnicza SA

Vamed Group

Poland > Real estate Tier 1

The real estate team at CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k. is led by London-based Caroline Maude and also includes construction specialist Lidia Dziurzyńska-Leipert and Anna Brzoza-Ostrowska. In particular, its is known for assisting property funds with the acquisition and disposal of prime assets as well as acting for developers, banks and retailers on all aspects of the investment process. In recent work, the group advised Amundi Real Estate on the acquisition of the Class A Nowogrodzka Square office building in Warsaw. Wojciech Koczara and Andrzej Zajac left the firm.

Practice head(s):

Caroline Maude

Other key lawyers:

Lidia Dziurzyńska-Leipert; Anna Brzoza-Ostrowska


‘Anna Brzoza-Ostrowka’s team managed to make a complicated first transaction in Poland as swift and smooth as possible. We really appreciated her clear and precise explication regarding Polish law. She is also very business oriented in her recommendations.’

‘Anna is a very great professional, with great agility to reconcile the imperative legal practices, business needs and the client’s own practices. She also has an impressive work capacity. ’

‘Goal oriented, focused on closing the deal, efficient and fast. Broad market experience and easy access to know how on more mature Western Europe markets’

‘Lidia Leipert is exceptional’.

‘CMS’ team is very proactive and is unique in that every deal is supported by a number of lawyers / support staff which are very well coordinated – that makes each case very quick and smooth to execute. ’

‘The CMS team I normally work with includes Anna Brzoza: they are definitely very competent and at the same time very proactive. The team is really motivated on each appointment and are pushing for an outcome which makes great result on our deals.’

Key clients

Allianz Real Estate

Amundi Real Estate

REInvest Asset Management

Motel One

Corum XL






Alkyon Partner Development

TR Warszawa

Poland > Tax Tier 1

At CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k., 'services are provided in a professional manner' by 'a strong team of tax experts across the CEE region that can provide coordinated advice on complex, cross-border matters'. The group in Warsaw is composed of tax advisers as well as contentious tax specialists. Areas of expertise for the team include tax structuring, transactions, transfer pricing and cross-border tax advisory work, but also tax investigations. The department, and the broader CEE tax group, is led by Andrzej Pośniak, who often coordinates cross-border advisory projects across the region. Łukasz Dynysiuk has a solid practice advising on tax planning and the tax aspects of M&A, particularly in the oil and gas sector. Małgorzata Brauckmann-Sajkiewicz is a member of the office's German desk and alongside a transactional tax practice, represents clients before the tax authorities and administrative courts. The firm has introduced a number of innovations to its service, including an automated system that assists clients with mandatory tax disclosure requirements in relation to cross-border transactions.

Practice head(s):

Andrzej Pośniak

Other key lawyers:

Łukasz Dynysiuk; Piotr Nowicki; Małgorzata Brauckmann-Sajkiewicz


The services are provided in a professional manner by a team of specialists with in-depth knowledge of the industry, extensive practical experience and high substantive competence. The services are provided on time and are of high quality meeting or exceeding expectations.’

The entire team is very pro-active and fast in answering questions and requests. This is very much appreciated in our fast paced environment.’

Małgorzata Brauckmann-Sajkiewicz has strong personal commitment and a timely performance of tasks, combined with good communication and, of course, professional skills.

Quality service, technical strength, communication and engagement management are top notch!

Billing is very detailed, it leaves no concerns for unknown charges and allows for good collaboration and clarity on cost/benefit.’

CMS has a strong team of tax experts across the CEE region and can provide coordinated advice on complex, cross-border matters.

Key clients

Grupa Azoty

Polski Fundusz Rozwoju (PFR)

Modus Group

mBank (Commerzbank Group)

Macquarie’s Group – Green Investment Group

Montagu Private Equity – portfolio company OASIS

Amundi Immobilier

Bayerische Landesbank

PZ Cussons


Corum XL

nextbike GmbH

MZN Property S.A.

Pierre Fabre

Poland > TMT Tier 1

The 'highly motivated' team at CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k. is led by Tomasz Koryzma. With an outstanding reputation for handling IT implementation projects (including disputes arising from agreements), it is particularly known for advising digital business and TMT clients. Notably, it counts major players such as eBay within a portfolio that also includes travel, healthcare, pharmaceuticals, digital business and insurance clients. In one highlight, it advised Airbnb on the addition of new services within the Polish market, which included an assessment of the legal and regulatory aspects of providing customer experiences via online platforms.

Practice head(s):

Tomasz Koryzma


‘Highly motivated team with unique experiences related to IP cases.’

‘Direct open, efficient communication and high quality of outputs.’

Key clients


Apo Discounter

ING Aleo




Poland > White-collar crime Tier 1

CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k.'s 'client-centric' team is well versed in all types of business-related criminal law, with experience in investigations and criminal proceedings relating to anti-bribery, corruption and money laundering. The group is most known for its investigations work, advising companies on internal investigations and representing them in investigations launched by the authorities, while also advising on crisis management issues. It also has a compliance practice. 'Charismatic and passionateArkadiusz Korzeniewski heads the team in Warsaw, also leading the white-collar crime group across the CEE region. Senior associate Maciej Kópczyński often supports Korzeniewski, and is increasingly active in the cybercrime space, as is fellow senior associate Mariusz Minkiewicz.

Practice head(s):

Arkadiusz Korzeniewski

Other key lawyers:

Maciej Kópczyński; Mariusz Minkiewicz


‘Throughout my relationship with this law firm I can confirm that lawyers are professional and willing to cooperate. They do emphasize the details and assist in the best way possible.’

Very good communication skills.

‘Lawyers within CMS law firm are always available to assist their clients, at any time and even during public holidays.’

‘Customer centric firm! Fantastic customer focus – very approachable understanding, adjusting to customer, supportive in all aspects. Great advice.’

‘Arkadiusz Korzeniewski is a great communicator, client-centric, experienced, supportive, reachable and always following the needs and issues critical for the customer. Cooperation with Mr Korzeniewski is always a big pleasure!’

‘Professional, focused and passionate about their work – give comfort, composure – anticipate issues and prepare individuals for what they are likely to face – present things as they are to avoid any surprises’

‘Arkadiusz Korzeniewski – charismatic and passionate; wealth of experience; lets you sleep at night in difficult times’

Maciej Kopczynski – pragmatic, methodical and consistent in preparations; composed and providing comfort when one needs it most.

‘I think this firm is unique because of the deep legal knowledge , the research of the case, the good relations with the opposing side and the respect the judge feels towards the firm. the team’s strength is the cooperation between the lawyers in our firm and theirs, without fear of hard work, very driven direct towards our mutual purpose, always believe that we will win – as we did.’

‘We worked with Arkadiusz Korzeniewski who stands out for his tremendous knowledge both legal and general, and his excellent connections . He gave us full attention and put all his efforts to the case and never gave up, even at times when it seemed lost. The legal procedure required diplomatic skills and legal knowledge of international criminal legal practice and I can say we were in the best legal hands. ’

‘It is unique in its experience, pro -active approach and correct risk assessment.

Poland > Banking and finance Tier 2

At CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k., lawyers advise Polish and foreign banks and financial institutions, as well as property and investment funds on finance transactions across Poland and the CEE region. The group is also able to handle regulatory issues, with a strong practice advising banks on their compliance alongside the Polish authorities. The team is led by transactional financing expert Michał Mężykowski, who is additionally focused on debt restructurings. Jakub Podkowa is the name to note for advice on day-to-day banking operations. Jakub Wieczorek is also a key figure in the group. In March 2021, Mark Segall departed for Dentons. Marek Trzos-Rastawiecki and Ilona Fedurek have left the firm for ITMA Bartczak Dulska Trzos-Rastawiecki spółka jawna and SSW Pragmatic Solutions respectively. Rafał Zakrzewski was a new arrival in September 2021.

Practice head(s):

Michał Mężykowski

Other key lawyers:

Jakub Podkowa; Jakub Wieczorek; Martyna Markiewicz; Rafał Zakrzewski


‘Wide experience with very good understanding of the commercial aspects of the transactions, full involvement in the projects, presenting/ proposing alternative solutions in case of any problems, delivering documents in time even if the deadlines are very tight.’

‘CMS – Responsive and easy to deal with. Trying to accommodate all parties points of view. Seems reasonably priced. Team is not small so may pursue various deals at the same time. ’

‘Michał Mężykowski: Listening to all parties’ requests and always trying to find amicable solutions that will work for everyone. Flexible. ’

‘It is a very solid real estate finance practice representing lenders. They are nice to work with and have a pretty good understanding of the market. ’

‘Jakub is a very sensible guy who knows how to manage his clients and remain intellectually independent. Therefore, negotiations with him are always productive and on merits. He is not a pushover though. He is very knowledgeable and likeable too. If I need to recommend a bank-side lawyer to my clients, he is my top choice.’

‘Strong business acumen, high client focus and efficient delivery.’

Key clients

Aareal Bank AG

Allianz Real Estate



mBank S.A.


Bank BNP Paribas S.A.

Bank Gospodarstwa Krajowego

Bank Polska Kasa Opieki S.A. (Pekao)


Bank Millennium

Credit Agricole

Erste Group Bank AG



ING Bank Śląski S.A.

Raiffeisen Bank

Grupa Azoty

Bayerische Landesbank

Poland > Capital markets Tier 2

At CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k., the team handles initial and secondary public offerings, investment structuring, public company transactions and exits from public markets. On the debt side, the group is well-versed in securitisation projects. In addition to assisting clients with transactions, practitioners are also knowledgeable about shareholder relations and corporate governance issues, and draw on their significant regulatory expertise. Rafał Zwierz, who heads up the department, has a strong transactional background. Senior associate Katarzyna Grodziewicz specialises in securities law, while senior associate Magdalena Zmysłowska is valued for her 'unique knowledge in capital markets regulation'. Rafał Zakrzewski was a new arrival in September 2021.

Practice head(s):

Rafał Zwierz

Other key lawyers:

Katarzyna Grodziewicz; Magdalena Zmysłowska; Rafał Zakrzewski


‘Dedicated and passionate individuals with broad experience in a subject covered. I value the most their ability to provide the clients with a bunch of solution, while clearly explaining all the pros and cons of them.’

‘Rafał Zwierz is the lawyer we want on our side for future deals. Business oriented with calmness that helped a lot in closing negotiation.

Magdalena Zmysłowska has unique knowledge of capital markets regulation, supported by the Ph.D. thesis on delisting. She is able to think not only on the legal level, but also from the business perspective. In other words, she is a rare example of perfect compilation of scholar activities with strong business orientation. ’

‘CMS has a large M&A team with a strong track record in energy sector transactions. They also have one of the largest regulatory teams in Poland, which makes them well-positioned to advise on complex transactions and investment projects. I value their practical approach to solving our problems and find them responsive and supportive.’



Key clients

Grupa Azoty S.A.

Grupa Azoty Zakłady Chemiczne “Police” S.A.

PKO Bank Hipoteczny S.A.

Work Service S.A.

MZN Property S.A.

DataWalk S.A

Amica S.A.

Nextbike S.A.

Dom Maklerski PKO Banku Polskiego

Sleepz AG

Unum Group

Generali Group

Poland > Commercial, corporate and M&A Tier 2

CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k. is known for its focus on the energy, manufacturing and financial institutions industries, where it advises corporates and investors on the spectrum of their transactions in Poland. The group was strengthened in August 2020 by the arrival of Mateusz Stępień and Sławomir Czerwiński, both of whom are experts in private equity deals, from Clifford ChanceBłażej Zagórski has an active transactional practice and has a niche in advising German-speaking clients on their investment projects in Poland. The department is led by Rafał Zwierz, who is an M&A veteran. Of counsel Olga Czyżycka is also recommended for cross-border deals and capital group restructurings.

Practice head(s):

Rafał Zwierz

Other key lawyers:

Błażej Zagórski; Dariusz Greszta; Sławomir Czerwiński; Mateusz Stępień; Olga Czyżycka; Jarosław Gajda; Grzegorz Pączek; Katarzyna Grodziewicz; Rafał Burda


‘I value Mateusz Stepien as a smart and pragmatic M&A lawyer. He is a big step ahead for the CMS team and will certainly give a great boost to CMS’ practice in Poland.’

‘Dedicated and passionate individuals with broad experience in a subject covered. I value the most their ability to provide the clients with a bunch of solution, while clearly explaining all the pros and cons of them. Very extensive experience in mergers and acquisitions, allowing to effectively handle both small private transactions and large stock exchange transactions.’

‘Rafał Zwierz is the lawyer we want on our side for future deals. Business oriented, with exceptional legal knowledge and calmness that helped a lot in closing negotiation.

‘Very reliable team, reactive, practical, dedicated, pleasant, solutions oriented ’

‘Blazej Zagorski and Grzegorz Paczek are very professional and dedicated ’

‘Super business-mindedness, very practical solutions, extra short time of response, a lot of attention to details’

‘Knowledgeable team – good, complementary mix of competencies – focused on moving things forward ’

‘Strong hard working team – take good care of their customers – good understanding of client’s needs – pragmatic in their approach ’

Key clients

Modus Group

Green Investment Group

PZ Cussons

Bonair S.A.

Polski Fundusz Rozwoju S.A. (Polish Development Fund)

Grupa Azoty Polyolefins S.A.

MZN Property S.A.

Offsite Archive Storage & Integrated Services (Ireland) Ltd. (OASIS) and Montagu Private Equity

MEAG Munich ERGO Asset Management GmbH

Nextbike GmbH

Alligator Ventilfabrik GmbH and Alligator Polska sp. z o.o.

CEE Equity Partners

Work Service S.A.

Advent International and its portfolio company Zentiva

AB Electrolux

mBank S.A. and its portfolio companies

Phillips Fortech Poland

Kino Świat sp. z o.o.

Poland > Data privacy and data protection Tier 2

At CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k., lawyers are actively involved in the area of data protection and GDPR advisory work, with experience representing clients before the data protection authorities. The department is led by Tomasz Koryzma, who is increasingly active in new technologies law, including in relation to AI. Koryzma has deep experience in data privacy, and the multijurisdictional use of data. Senior associate Damian Karwala specialises in international digital businesses and financial institutions, which he advises on the spectrum of TMT law, including cybersecurity.

Practice head(s):

Tomasz Koryzma

Other key lawyers:

Damian Karwala; Paulina Komorowska

Key clients

ING Aleo

International Paper

Partner in Petfood



Iron Mountain


Grid Dynamics

Poland > Intellectual property Tier 2

Led by technology law expert Tomasz Koryzma, the IP team at CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k. focuses on four core sectors: fashion and luxury goods, chemicals, cosmetics and pharmaceuticals. It has a strong track record for trade mark and patent enforcement, and is particularly known for its ability to handle complex, high-value cases. The groups serves as L’Oréal's exclusive anti-counterfeiting adviser in Poland, a role which involves handling all customs and criminal seizures related the company's entire portfolio. Associate Karina Zielińska-Piątkowska is another key name to note.

Practice head(s):

Tomasz Koryzma

Other key lawyers:

Karina Zielińska-Piątkowska


‘Exceptional quality of work, exceptional capacity, flexibility/agility, top-shelf legal qualifications and experience and good knowledge of business/market.’

‘The great network and the fact that they have offices in a number of jurisdictions is very helpful. The way that they operate through a single point of contact is very helpful as we have one contact person handling all matters. They have a strong knowledge and understanding of the law and its applicability to the client’s business.’

Key clients



HP Inc

PZ Cussons

SKY International

HP Enterprise


Bayer AG


Poland > Private equity Tier 2

Private equity is a core pillar of CMS Cameron McKenna Nabarro Olswang Pośniak i Bejm sp.k.'s practice in Poland. The group advises a host of private equity investors on their activity in Poland and the CEE region. In addition to strong transactional capabilities the group also has the back-up of a solid regulatory practice, enabling it to provide well-rounded advice to sophisticated private equity clients, extending to fund formation. In August 2020, the firm welcomed a team from Clifford Chance, including Sławomir Czerwiński and Mateusz Stępień, bolstering the group's private equity investment offering. The department itself is jointly led by Błażej Zagórski and Polish-, US, and English-qualified Rafał Zwierz. Counsel Olga Czyżycka, who is also known for her acumen in corporate transactions, is also noted.

Practice head(s):

Rafał Zwierz; Błażej Zagórski

Other key lawyers:

Dariusz Greszta; Sławomir Czerwiński; Mateusz Stępień; Olga Czyżycka


A strong team with complementary expertise and good client management.’

Good, pragmatic advice with an eye on the business needs of a client.’

We have worked primarily with Rafal Zwierz and Olga Czyzycka. Both have stepped up every time we have asked them to do so and have done so without surprises in billing.’

Key clients

Advent International

CEE Equity Partners

Abris Capital Partners

Montagu Private Equity

Macquarie’s Green Investment Group

Polish Development Fund S.A. (Polski Fundusz Rozwoju S.A.)

MEAG Munich ERGO Asset Management GmbH

mAccelerator and its portfolio funds


Fundusz Ekspansji Zagranicznej FIZ AN

CMS Poland is an international law firm which finds effective solutions for your legal challenges. We are one of the largest and most experienced international law firms in Poland – for over 25 years, we have been successfully working hand-in-hand with our clients that operate locally and cross-border.

With over 170 lawyers in Poland, we provide a full range of legal and tax advisory services to all sectors of the economy, advising on current challenges, as well as anticipating challenges on the horizon that are likely to shape the future. Our teams in Warsaw and Poznań operate as part of an international network of 70 offices with 4,800+ lawyers located in 40 countries around the world, which allows us to offer you the highest quality legal advice, wherever you conduct or intend to conduct business.

As a future-facing firm, we take a bold, dynamic and agile approach to help clients of every size face the future with confidence. At CMS, we work in partnership with national and international businesses, from multi-nationals to start-ups, helping to meet business objectives, complete projects and close deals. The size of our teams and our international network of lawyers enable us to work on projects of any scale. Our clients include multinationals and the largest Polish enterprises, as well as family businesses, financial institutions and public-sector entities. Thanks to our lawyers’ sector specialisation and focus on regulated sectors, as a CMS client you will benefit from our comprehensive knowledge of current trends and challenges in your industry, as well as the support of a team that understands the specifics of conducting business in your sector of the economy.

Our experienced Corporate and M&A experts offer you legal advice and support in transaction management. We can support you in capital market emissions, both nationally and internationally. If you are involved in a dispute, our business-minded Dispute Resolution Team will develop the right tactics and strategy to navigate you through the process. We can also support your real estate and construction projects through all the phases. As Poland’s leading energy and environmental law team, we advise on all types of investment projects and regulatory issues. We also help businesses with financing projects, infrastructure and PPP undertakings, and advise you on compliance, competition, public procurement, new technologies and tax issues.

We see our expertise as a tool to find solutions to your legal problems and help ensure the continued success of your business.
If your business operates outside Poland, your legal issues will also be cross-border. CMS offers a unique coverage of Europe and beyond. With our geographical coverage, we can provide you with a seamless service and a single point of contact.

Department Name Email Telephone
Managing Partner, CMS Poland/Head of Tax Andrzej Pośniak + 48 22 520 56 73
Real Estate Caroline Maude +44 20 7524 6445
Banking & Finance/Restructuring & Insolvency Michal Mezykowski +48 22 520 8307
Corporate/M&A/Capital Markets/Private Equity/Investment Funds Rafal Zwierz +48 22 520 56 71
Construction/Real Estate Lidia Dziurzynska-Leipert +48 22 520 5659
Competition Malgorzata Urbanska +48 22 520 5597
TMT/Intellectual Property/Data Protection Tomasz Koryzma + 48 22 520 8479
Dispute Resolution Malgorzata Surdek +48 22 520 5555
Employment Katarzyna Dulewicz +48 22 520 5519
Energy & Projects/Infrastructure & Project Finance Marcin Bejm +48 22 520 5667
Insurance Ewa Swiderska +48 22 520 5581
Environment Agnieszka Skorupinska +48 22 520 8336
Lifesciences Malgorzata Urbanska +48 22 520 5597
Public Procurement Malgorzata Urbanska +48 22 520 5597
White Collar Crime Arkadiusz Korzeniewski +48 22 520 5658
Investment Funds Błażej Zagórski + 48 22 520 84 01
Investment Funds Łukasz Dynysiuk + 48 22 520 56 29
Private Equity Sławomir Czerwiński + 48 22 520 55 27
Photo Name Position Profile
Ms Ewa Świderska  photo Ms Ewa Świderska Counsel
Mr Maciej Andrzejewski photo Mr Maciej Andrzejewski Senior Associate
 Marcin Bejm  photo Marcin Bejm Partner, Head of the Energy and Projects Department at CMS Poland
Mr Michał Bork  photo Mr Michał Bork Michał Bork is a legal advisor and Counsel in the Real Estate…
 Małgorzata Brauckmann-Sajkiewicz  photo Małgorzata Brauckmann-Sajkiewicz Counsel
Mrs Anna Brzoza-Ostrowska  photo Mrs Anna Brzoza-Ostrowska Anna Brzoza-Ostrowska is a qualified legal advisor and Partner in the Real…
 Rafał Burda  photo Rafał Burda Senior Associate in the Corporate/M&A Department
Ms Anna Cudna-Wagner photo Ms Anna Cudna-Wagner Partner
 Sławomir Czerwiński  photo Sławomir Czerwiński Partner in the Corporate/M&A Department
 Olga Czyżycka  photo Olga Czyżycka Counsel in the Corporate/M&A Department
Mrs Katarzyna Dulewicz  photo Mrs Katarzyna Dulewicz Partner
 Łukasz Dynysiuk  photo Łukasz Dynysiuk Partner in Tax Team
Mrs Lidia Dziurzyńska-Leipert  photo Mrs Lidia Dziurzyńska-Leipert Lidia Dziurzynska-Leipert is a partner and head of the Construction Group within…
 Jarosław Gajda  photo Jarosław Gajda Counsel in the Corporate/M&A Department
Mr Dariusz Greszta  photo Mr Dariusz Greszta Senior Counsel, Corporate/M&A Department
 Katarzyna Grodziewicz photo Katarzyna Grodziewicz Senior Associate in the Corporate/M&A Department and in the Capital Markets practice
Mr Adam Jodkowski photo Mr Adam Jodkowski Senior Associate
Mr Maciej Kópczyński  photo Mr Maciej Kópczyński Senior Associate
Mr Damian Karwala  photo Mr Damian Karwala Senior associate
Mr Tomasz Koryzma  photo Mr Tomasz Koryzma Partner, Head of the IP/TMT Group
Mr Arkadiusz Korzeniewski  photo Mr Arkadiusz Korzeniewski Partner, Head of CEE White-Collar Crime 
Ms Katarzyna Kucharczyk photo Ms Katarzyna Kucharczyk Counsel
Ms Joanna Młot  photo Ms Joanna Młot Counsel
 Michał Meżykowski  photo Michał Meżykowski Partner, Head of the Banking and Finance Department in Poland
 Tomasz Minkiewicz photo Tomasz Minkiewicz Partner, Head of the Oil & Gas Sector Team at CMS Poland
Mr Mariusz Minkiewicz  photo Mr Mariusz Minkiewicz Senior Associate
 Grzegorz Pączek  photo Grzegorz Pączek Senior Associate in the Corporate/M&A Department
 Andrzej Pośniak  photo Andrzej Pośniak Managing Partner at CMS Poland, Head of Tax
Mr Tomasz Sancewicz  photo Mr Tomasz Sancewicz Counsel, Attorney-at-law
 Agnieszka Skorupińska  photo Agnieszka Skorupińska Partner, Head of the Environmental Law Practice in Poland and CEE
 Mateusz Stępień  photo Mateusz Stępień Partner in the Corporate/M&A Department
 Małgorzata Surdek  photo Małgorzata Surdek Partner; Head of Dispute Resolution
 Łukasz Szatkowski  photo Łukasz Szatkowski Partner at CMS Poland
 Małgorzata Urbańska  photo Małgorzata Urbańska Partner; Head of Competition Group in Poland; Head of Consumer Products Sector…
 Jakub Wieczorek  photo Jakub Wieczorek Partner in the Banking and Finance Department
 Błażej Zagórski  photo Błażej Zagórski Partner in the Corporate/M&A Department
 Andrzej Zając  photo Andrzej Zając Andrzej Zając is an Advocate and Counsel in the Real Estate and…
Mr Marcin Zbytniewski  photo Mr Marcin Zbytniewski Counsel
 Magdalena Zmysłowska  photo Magdalena Zmysłowska Senior Associate
 Rafał Zwierz  photo Rafał Zwierz Partner heading Corporate/M&A department and Capital Markets practice at CMS Poland
Poland : over 170 lawyers in Warsaw and Poznan offices in Poland
CMS worldwide : 4,800+ lawyers in 70 offices in over 40 countries

As a global future-facing law firm, diversity & inclusion are not just aspirations for us – they are an imperative. We are committed to fostering a supportive and inclusive culture that encourages authenticity and celebrates all our people and their unique backgrounds. As they are central to our culture, we ensure that diversity and inclusion are at the forefront.

Our aim is to build a culture of trust, respect and inclusion which embraces differences and encourages diversity of people, views and experiences for the benefit of all.

Our D&I strategy, Future Facing Inclusion, is a way of thinking and being. It brings together everyone at CMS, as well as our clients and communities, whatever their backgrounds, to develop thriving careers, positive cultures and new ways of working. It is a force for change.

Diversity & inclusion is championed at the senior level across the firm. Our Managing Partner, Andrzej Pośniak, is a great advocate for D&I and champions it internally and externally to ensure that CMS drives change not only for its people and communities, but also for the legal sector and the wider business community.

As for our D&I initiatives, once a year we organise the CMS Diversity & Inclusion Festival to celebrate differences, to keep this essential debate going, and to share our experience and knowledge. Moreover, in Poland we regularly join in the organisation of anti-discrimination initiatives, including meetings with the Polish Ombudsman, non-governmental organisations, leading Polish reporters and law students. In striving for gender equality, in 2021 we also partnered with the CFA Society Poland to release a report entitled “Women on boards and company performance”, which is aimed at verifying the view that gender equality is associated with better financial performance, lower risk, and a higher market valuation.