CDZ Chajec, Don-Siemion & Partners > Warsaw, Poland > Firm Profile

CDZ Chajec, Don-Siemion & Partners
00-687 WARSAW

Poland > Employment Tier 3

CDZ Chajec and Partners provides both individual and collective employment advice, including the labour aspects of M&A transactions, the transfer of employees, outsourcing services and group layoffs. The practice is recognised for its expertise in the business service sector, and being a member of INTERLAW, also acts for companies opening shared services centres across the CEE region in addition to those entering the Polish market. Ewa Don-Siemion and Piotr Kryczek jointly head the group.

Other key lawyers:


‘A distinguishing feature of CDZ is their close cooperation with the client and the willingness to learn about the business context and the needs behind the inquiries addressed to the law firm. After years of cooperation, I have the feeling that the knowledge of the processes by the employees of the law firm is as good as it would be for an internal employee of the legal department. This greatly facilitates work on subsequent projects. Despite the completed calendar, in the event of an urgent need for consultation, we have never been left without support. The law firm supports our HR department also in the education of our management team, which positively affects their independence in fulfilling the role of people managers. During the pandemic, despite the lack of the possibility of personal meetings, the cooperation did not suffer in any way, and the use of videoconferencing tools used by our company made the cooperation run smoothly and effectively.’

‘Our main point of contact is Mr. Dariusz Zimnicki, who has been supporting us for years in matters of labour law, civil law contracts and any other topics that arise in our organization. It is very important to understand our business needs, which means that the opinions and analyses delivered by Mr Zimnicki are adequate to the realities in which we operate and possible to implement. His communication skills are also exceptional. Both in contact with our management board, finance departments, HR or directly with people managers at various senior levels. He is always able to transfer knowledge and practical examples to a group of listeners. He is also a great business trainer – delivered in person as well as through videoconferences, the training provided is practical and engaging for the audience. He knows our company very well, is aware of the challenges we’re facing, knows our internal processes and policies and this makes the collaboration really smooth and effective.’

Key clients


Alexander Mann Solutions

Computacenter Poland

Schibsted Tech Polska B.V.

Grid Dynamics

OCADO Technology



Centerscape Investments Poland

Prisjakt Poland

Centerscape Investments Poland

Cero Generation Services

Sappi Europe

Work highlights

  • Supporting Ocado Technology in changing the employment structure, including implementation of B2B as a form of employment.
  • Assisted on establishing working relations with new trade unions in the company.
  • Advised AON in the major issues related to the employment including a new incentive plan and court disputes with the employees.

Poland > Real estate Tier 3

CDZ Chajec, Don-Siemion & Partners brings to a close real estate due diligence and transactions concerning developed land, offices, retail, hotels and logistical centres, often acting on projects which involve the wider M&A, finance, capital markets, TMT and administrative law expertise of the firm. Patryk Galicki  leads the team alongside co-head Piotr Zapalski.

Practice head(s):

Key clients



Centerscape Investments

Centerscape Properties

TASC Infrastructure

Capital Park Group

Griffin Real Estate

Agencja Kapitałowo-Rozliczeniowa

Work highlights

  • Advised Silesian Properties on the acquisition of retail assets from Alferno Investments.
  • Advised Ghelamco and private investors on a transaction involving a shopping mall in a prime location in Warsaw, developed on the real properties held by two companies, where the company managing the shopping mall, was one of the first share companies in Poland during the unchartered period right after the transformation of Poland from communist to market economy.
  • Assisting Cordia in its new housing development project.

Poland > Commercial, corporate and M&A Tier 4

CDZ Chajec, Don-Siemion & Partners‘ team is regularly instructed in domestic M&A, company reorganisations, joint ventures and equity investments. The team is particularly knowledgeable about the technology and real estate sectors. Co-founding partner Andrzej Chajec leads the department. with a niche in advising companies on investment processes and capital restructuring. Szymon Skiendzielewski is the name to note for private equity and investment funds issues. Jolanta Okoniecka also has a strong corporate transactional practice.

Practice head(s):

Andrzej Chajec

Other key lawyers:

Szymon Skiendzielewski; Maciej Kotlicki; Jolanta Okoniecka

Key clients

Land S.A.

Balticus S.A.

Work highlights

  • Advised Balticus on an open subscription (subskrypcja otwarta) of a Polish-based manufacturer of high-end watches. Support involved drafting legal documentation connected with an issue of the company’s shares to individual investors.

Poland > Dispute resolution Tier 5

CDZ Chajec, Don-Siemion & Partners is able to handle a wide range of proceedings, including litigation, negotiations, mediation and alternative dispute resolution. The group is most noted for its work in relation to construction disputes, representing general contractors in private disputes and disputes with the state. The team also has experience representing bankruptcy trustees. Aleksandra Hulewicz heads the team and is an expert in FIDIC contracts. Piotr Kryczek  is a specialist in contentious trade marks but also handles competition disputes. Marcin Lizurek is another name to note for construction disputes.

Practice head(s):

Aleksandra Hulewicz

Other key lawyers:

Piotr Kryczek; Marcin Lizurek; Radek Rudnik


‘Chajec, Don-Siemion & Zyto Legal Advisors is very responsive to any queries a client may have and proactively provides creative solutions for the clients’ specific issue.’

Work highlights

  • Conducting several hundred lawsuits related to claims for damages connected with limitations on the use of real estate in connection with creation of a limited use area around the Poznan airport
  • Representing clients in individual proceedings and relations with banks in connection with Swiss franc mortgage loans.
  • Representing the legal successor of a former state-owned enterprise in two proceedings related to the usucaption of municipal properties located in prime locations in Warsaw and in a neighbouring municipality.

We offer more than just legal advice: In the end, it’s all about QUALITY. About commitment to legal excellence, outstanding client service, and ability to develop forward-thinking legal solutions.

We always apply legal expertise in the context of your business needs and issues.

Our approach is practical, solution-based and innovative. We don’t waste your time or money on legal theories.

We work alongside your company, help you grow, manage and optimize your business, implement new technologies, forge new partnerships, resolve conflicts and meet your obligations.

We have offices in Warsaw, Krakow and Lodz.

What We Do: Our expertise covers transactional, corporate, litigation and regulatory issues. We handle complex situations by deploying multi-skilled teams.

As a member of Interlaw, the International Association of Independent Law Firms, we advise on cross-border matters by working in integrated teams from almost 100 jurisdictions. We guide clients through the local legal and business environment.

We support leading organizations representing the shared services sector in Poland.

Our work is internationally recognized: We have nine standout practices ranked by The Legal 500 EMEA, Chambers Europe and IFLR1000. In 2021 we have been recommended in the field of corporate, commercial and M&A, banking and finance, capital markets, dispute resolution, employment, private equity, real estate, restructuring and Insolvency. Our lawyers are recommended as leaders in their respective practice areas.

Areas of practice: We are a full service law firm with a strong transactional record, well-known for telecoms expertise, active in the media and technology sectors, and known for private equity transactions.

We have solid experience with the business services sector where we offer complex employment and HR solutions. We have advice on opening shared services centres in Poland.

Real estate is one of the core areas of our activity. We represent Polish and foreign entities, such as investment funds, developers and investors. We provide advice on all types of real estate transactions, including project finance.

We advise on corporate and commercial issues, mergers and acquisitions (also including transactions between public companies), IPOs and other capital markets transactions.

Private Equity Andrzej
Corporate and Commercial Law Jolanta
Employment and Labour Law Ewa
Legal Process Outsourcing Ewa
Data Protection Piotr
Real Estate and Construction Patryk
Project Finance Szymon
Capital Markets Maciej
Real Estate and Construction Piotr
M&A Andrzej
Competition Law Piotr
Intellectual Property Piotr
Securities and Venture Capital Investments Maciej
Krzysztof Żyto  photo Krzysztof Żyto Krzysztof specializes in dispute resolution, restructuring and insolvency law. His practice is…
Andrzej Chajec  photo Andrzej Chajec Andrzej has over 20 years’ experience in transactional work, principally in venture…
Ewa Don-Siemion  photo Ewa Don-Siemion Ewa specializes in advising international clients on employment law with a particular…
Patryk Galicki  photo Patryk Galicki Patryk has over 17 years’ experience in real estate law and mergers…
Maciej Kotlicki  photo Maciej Kotlicki Maciej specializes in mergers and acquisitions, and capital markets transactions. He advises…
Piotr Kryczek  photo Piotr Kryczek Piotr specializes in competition law, employment, intellectual and industrial property law, with…
Jolanta Okoniecka  photo Jolanta Okoniecka Jolanta has over 20 years’ experience in corporate work, M&A and commercial…
Szymon Skiendzielewski  photo Szymon Skiendzielewski Szymon advises private equity and investment funds, Polish and international companies as…
Piotr Zapalski  photo Piotr Zapalski Piotr has over 16 years’ experience in real estate law. He advises…