Firm Profile > Ploum > Rotterdam, Netherlands

PO BOX 711

Netherlands > Energy: transactional Tier 2

Rotterdam-based Ploum is noted for its expertise in the oil and gas sector. It draws on strength from its public and environmental law, and commercial and corporate law experts, to provide advice on midstream and downstream activities. Its team also has experience of mandates in the upstream sphere. Stephan Sluijters has over 20 years of experience in energy transactions and continues to add renewables companies to his client roster. Maayke Maas-Cooymans handles public law matters for energy companies. Jeroen Terstegge is another name to note.

Practice head(s):

Stephan Sluijters; Jeroen Terstegge

Other key lawyers:

Jolande van Loon; Maayke Maas-Cooymans;Jacob Henriquez


‘The client service from the energy transactional practice is always excellent’

‘The quality of the advice and deep energy sector knowledge is not only seen by clients but also recognised by competitors in the market’.

‘Client-driven and very easy to work with’.

‘Truly first class, due to a combination of consistent high-quality advice, partner attention, commitment and team continuity’.

‘Stephan Sluijters is a respected and recognised dealmaker’.

‘Stephan Sluijters is very easy to work with and is hands-on’.

‘The energy transactional practice is very strong and has an outstanding track record’.

‘A great combination of experienced partners and more junior lawyers’.

Key clients

BayWa r.e. renewable energy GmbH


COVA – The Netherlands Petroleum Stockpiling Agency

Eneco N.V.

GroenLeven B.V.

One-Dyas B.V.




Social Investment Managers and Advisors, LLC (SIMA) and Angaza (Angaza)

Orgaworld Nederland B.V.

CrossWind – Joint Venture of Shell and Eneco

Renewable Energy Factory B.V.

Netherlands > Environment and planning Tier 2

Ploum’s environmental and planning department acts at the forefront of developments in the energy industry, including the energy transition, climate change and the nitrogen deposition crisis; it has recently been involved in carbon capture and storage (CCS) and (green and blue) hydrogen production projects. Practice head Maayke Maas-Cooymans acts as a compliance officer for BP, advising on environmental permits. The team is headed by Alexandra Danopoulos, who was recently promoted to partner. Since publication, Stephan Sluite left the firm.

Practice head(s):

Maayke Maas-Cooymans; Alexandra Danopoulos

Other key lawyers:

Brigitte Ebben; Jouko Barensen


‘The lawyers of the Rotterdam law firm Ploum present themselves as one team’.

‘Bright, no-nonsense, helpful lawyers who understand the needs of their client’.

‘I would always recommend them to my peers’.

‘I mostly worked with Maayke Maas-Cooymans, she is a terrific lawyer, creative, approachable, kind and always willing to help out’.

‘Very Professional Lawyers who understands legal issues fast and provide legal help and advise in a fast and pleasant way’.

‘Fast, direct and pleasant way of communicating’.

‘The Lawyers take the time and effort to understand the organisation of the client in relation to the concerning legal issues.’

‘Very up-to-date and in-depth knowledge of the legal area’.

Key clients


HG International B.V.

Vitol Tank Terminals B.V.

Eurotank Amsterdam B.V.

Euro Tank Terminal B.V.

Westpoort Warmte B.V.



Havenbedrijf Rotterdam

Dutch Accrediation Council (RvA)

BP (BP Raffinaderij Rotterdam B.V., BP Europa SE – BP Nederland and BP Oil International Limited)

Shell (Shell Nederland Raffinaderij B.V., Shell Nederland Chemie B.V. and Shell Europoort)

Dow Chemical

VPR Energy (formerly known as Koch)


Wintershall Noordzee B.V.

The Chemours Company


Koole Botlek Terminals (formerly known as Odfjell Terminals Rotterdam)

OCI Terminal Europoort B.V.

Oiltanking Amsterdam B.V.

Maltha Glasrecycling Nederland B.V.

Zeeland Refinery N.V.

Troy Moerdijk B.V.

B.V. Katwijk Chemie

TEAM Terminal B.V.

Koole Botlek Terminals (formerly known as Odfjell Terminals Rotterdam)

Maasvlakte Olie Terminal N.V.

Maatschap Europoort Terminal (MET)

Haan Oil Storage





Rio Tinto/Aluchemie

Begemann Mercury Treatment

Boskalis Nederland B.V.

Boskalis Environmental B.V.

Dura Vermeer


AM Grondbedrijf B.V.




NPO (Netherlands Public Broadcasting Institution)

TSH Management B.V. (The Student Hotel)

Municipality of Maassluis

Municipality of Nissewaard

Municipality of Dongen

Municipality of Capelle aan den IJssel

Court of Auditors of the municipality of Rotterdam

M7 Real Estate

BayWa r.e. Solar Projects GmbH



Remondis Dusseldorp Gevaarlijk Afval B.V.

Vereniging Nederlandse Petroleum Industrie (VNPI)

Aluchemie Rotterdam B.V.

Motip Dupli B.V.

Damen Shipyards

Rotterdam The Hague Airport

Eindhoven Airport N.V.


GroenLeven B.V.


Noord-Europees Wijnopslag Bedrijf

Evides N.V.

Hansteen Netherlands B.V.

Jacobs Douwe Egberts NL B.V.

Biopetrol Rotterdam B.V.

Glencore Agriculture B.V.

Rail Service Center Rotterdam B.V.

Gate Terminal B.V.

Van Oord Nederland B.V.

Netherlands > Industry focus: Food Tier 2

The food and product safety team at Ploum advises a range of clients on regulatory requirements, compliance, insurance, liability issues and litigation. As part of the Food Lawyers Network and the Greenlane network of law firms specialising in international trade law, the firm is well placed to provide food safety advice inside and outside the EU. Head of practice Marijn van Tuijl litigates on matters concerning the manufacture and international trade of goods.

Practice head(s):

Marijn van Tuijl

Other key lawyers:

Jikke Biermasz; Dorine ten Brink; Willem Leppink


‘They have 25 years’ experience in leading food issues in the Netherlands’.

‘In-depth knowledge of the food industry and compliance issues’.

‘Marijn Van Tuijl is a pro, his integration in one of the best customs team in the Netherlands makes Ploum’s practice unique’.

‘They are the best at assisting clients in complex investigations by regulatory and customs authorities’.

‘They are also fierce litigators and will get clients out of trouble when others would give up’.

‘Marijn van Tuijl is excellent and he understands business and the law better than most’.

Key clients


United Biscuits/ Verkade


ADM International (Archer Daniels Midland)


Omega Pharma (Perrigo)

Van Sillevoldt Rijst (VSR Rice)

Vergeer Holland

Doens Food International

AVH Dairy Trade

H. van Wijnen

Schouten Europe

Jacobs Douwe Egberts

Vernof (The Association of Dutch Producers of Edible Oils and Fats)

BayWa Agri Supply & Trade B.V.

NZV (Netherlands Subtropical Fruits Association)

Van Genugten Groep

United Dutch Breweries


Suiker Unie

Netherlands > Data privacy and data protection Tier 3

The multidisciplinary privacy team at Ploum is regularly instructed by clients on data matters relating to software, technology innovations, e-commerce work, marketing issues and e-health mandates. Dennis Zieren and Dorine ten Brink jointly lead the practice; Zieren is praised by clients for his 'personal and to-the-point advice', while ten Brink specialises in contract law. Associate Nina Witt is also singled out for her expertise in the healthcare sector.

Practice head(s):

Dennis Zieren; Dorine ten Brink

Other key lawyers:


‘Ploum has a single point of contact, hands-on, deep knowledge, pleasant communication, practical and pragmatic, fast specific and appropriate advice, innovative solutions, transparency with regard to costs/billing.’

‘The client service is always excellent, as is the quality of the advice. Dennis Zieren stands out. There is deep data privacy and data protection knowledge across the team. Client driven, focused and always there when you need them.’

‘Dennis Zieren provides personal and to-the-point advice that is of great added value to the client. Go-to person for all our ICT law, privacy and data protection law matters. Easy to work with and very responsive.’

‘The approach of this team is very responsive and hands-on. They have good knowledge of how to approach things from a business perspective, which as a client I find very helpful.’

‘Nina Witt is my main contact person. She is always quick to respond and more importantly she works from a practical angle, meaning that she understands very quickly how the business works and what to look for, so even potentially hidden issues can be identified.’

‘Professional attitude and a wide range of expertise.’

‘I am very satisfied. All lawyers with whom I work have a great deal of relevant professional knowledge, are available 24/7, have a pragmatic approach, take our commercial interests into account and are very much aligned with our business. My overall impression is very positive. Ploum has mainly highly qualified and kind people on board.’

‘Dennis Zieren has a lot of knowledge of all IT/privacy related matters and is able to explain a legal problem concisely and in legible language. He is able to quickly familiarise himself with a particular issue and respond quickly with very practical advice.’

Key clients

JDE Peet’s


Momo Medical


Stichting Loterij Incasso

JVH Gaming

Centriënt Pharmaceuticals



Netherlands > Insurance Tier 3

Ploum acts for insured companies and insurers and has particular expertise in health and safety matters, and matters involving hazardous or toxic substances. Its multi-disciplinary team draws on strength from its regulatory, environmental, corporate and criminal law practices. Other areas of focus include professional indemnity and construction-related insurance matters. Natalie Vloemans and Vincent Terlouw head the team.

Practice head(s):

Natalie Vloemans; Vincent Terlouw

Key clients

Koole Terminals Botlek / Odfjell Terminals




HDI Global Specialty

NPO (Nederlandse Publieke Omroep)


Swiss Re






Media Markt


Klap No Risk B.V.

Netherlands > Intellectual property: trade marks, copyrights and design rights Tier 3

Ploum provides a comprehensive offering in respect of trade mark, design, and copyright work for clients in sectors as varied as automotive, technology, luxury goods, food/beverage, and tobacco industries. It undertakes pan-European) litigation, extensive anti-counterfeiting and parallel trade work as well as tech-related copyright cases. The 'business-orientated' Willem Leppink and Sabin Tigu head the practice, while Dennis Zieren is a central team member of note.

Practice head(s):

Willem Leppink; Sabin Tigu

Other key lawyers:


‘I am very satisfied. All lawyers with whom I work have a great deal of relevant professional knowledge, are available 24/7, have a pragmatic approach, take our commercial interests into account, and are very much aligned with our business. My overall impression is very positive. Ploum has mainly highly qualified and kind people on board.’

‘Willem Leppink: I know Willem approx. 20 years. We have a very good relationship. Willem has a lot of expertise, is always willing to help out, has a very pragmatic approach, and takes our commercial interests into account. Willem is a real sparring business partner for all our related intellectual property matters!

‘Sabin Tigu is a very reliable and professional educated lawyer.’

‘Very good knowledge of our business, practical and business-oriented solutions, easy to deal with’

‘Willem Leppink, Sabin Tigu. Both very capable, easy to talk to, business-oriented.’

Key clients

Western Digital, including SanDisk




Japan Tobacco

Jacobs Douwe Egberts

UNIT4, business software house




LRC (Reckitt Benckiser Group)


Medical Pet Shirts

Under Armour


Satelliet Meubelen B.V.




Donna Karan



Netherlands > Commercial, corporate and M&a Tier 4

The ‘no-nonsense, pragmatic and highly knowledgeable’ team at Ploum offers firms in Amsterdam stiff competition’ from its Rotterdam base. The mid-sized firm has a substantial focus on the energy sector and counts Eneco, Engie Services and GroenLeven as clients; it has also expanded its expertise in the transport and logistics industry. Tom Ensink leads the practice, which also includes transport and logistics group head Albert Wiggers, energy expert Stephan Sluijters and Jeroen Terstegge.

Practice head(s):

Tom Ensink


‘The team is very much no-nonsense, pragmatic, highly knowledgeable and generally very pleasant to work with or to have act as opposing counsel. The firm is based in Rotterdam and is proud to offer firms in Amsterdam stiff competition.’

‘Tom Ensink is an overall outstanding transactional lawyer, who has evidently more than mastered all phases and all aspects of an M&A transaction. He superbly handles cross-border transactions involving many parties, with different interests, be it (strategic) buyers/sellers, investors, banks, borrowers or partners. In addition, he is very down-to-earth, very accessible, always available.’

‘The Ploum team is very hands-on with a can-do mentality. They have an entrepreneurial spirit and are always busy with getting the deal done.’

‘Stephan Sluijters is one of the best lawyers I know. He is really part of our business and a trustworthy partner.’

‘Jeroen Terstegge  provides the best of both worlds; a friendly, personal service combined with dedication, in-depth knowledge of the sector and cleverness. He provides excellent analysis and solutions in addition to flagging issues quickly. Next to being a real dealmaker he is able to zoom in to the detail to solve extremely difficult issues – always there when you need him.’

Key clients


ABN AMRO Energy Transition Fund

BayWa r.e. renewable energy



Transports Vervaeke

Equinix inc.

Dura Vermeer




Engie Services




One-Dyas Holdings

Matrans Holding

Renewable Factory

Ecclesia Gruppe

Enghouse systems


Active Capital


CED Holding

Eszet Bedrijven

Netherlands > Dispute resolution: Commercial litigation Tier 4

Clients of Rotterdam-based Ploum praise the 'in-depth knowledge', 'quick and decisive' reactions and 'excellent communication' of this substantial litigation team, which includes a dozen partners led by 'seasoned litigator' Maurice Verhoeven. The comprehensive corporate and commercial disputes practice includes Supreme Court litigation, regulatory issues, crime and professional liability.

Practice head(s):

Maurice Verhoeven

Other key lawyers:

Natalie Vloemans; Michel Jacobs; Dorine ten Brink


‘The dispute resolution team of Ploum, more specifically the corporate litigation team, has extensive knowledge on D&O and insolvency issues. The lines are short and effective. I would definitely request their assistance as defence counsel.’

‘Partners Maurice Verhoeven and Vincent Terlouw are seasoned, experienced litigators with all the necessary in-depth knowledge. They are also well known with the D&O insurance industry. An honorary mention is associate Thomas Munnik. He is definitely the new kid on the block with regards to corporate litigation (D&O and professional liability, more specific to the liability of accountants). I would describe him as a heavyweight associate on the terrain of corporate litigation. He definitely has an eye for the (necessary) details.’

‘The Ploum team of commercial litigation is a seasoned team of professionals working closely with their notarial services team. That way they are able to react quickly and decisively with optimum cooperation between the teams.’

‘Matthijs Gardien is an experienced hands-on lawyer who works closely with his clients to get the best result possible, whether it is litigation or out-of-court settlements. Matthijs is a highly-qualified professional, always quick to react and a pleasant person to work with. ’

‘Down to earth approach, excellent communication. Follow-up by colleagues during absence also of a good standard.’

‘Natalie Vloemans distinguishes herself in responsiveness in general, and is smart and resolute in litigation.’


Key clients

Deloitte Accountants

AIG Europe Limited, Netherlands

Liesker Procesfinanciering/Stichting Loterij Incasso/Mark Four Enterprises

HDI Global Speciality

Kuwait Petroleum (Netherlands)


Koninklijke Volker Wessels Stevin

Koole Tankstorage Botlek /Odfjell Terminals

Peterson Control Union

Mazars Berenschot Corporate Finance (MBCF)

NPO (Stichting Nederlandse Publieke Omroep/Dutch Broadcasting Union)


Liander Infra

ATM B.V. / Renewi Nederland

Netherlands > Employment Tier 4

Ploum’s employment practice is integrated with its M&A and privacy offerings. Noted for its strong capabilities in contentious and non-contentious matters, the firm acts for large multinational corporations, as well as smaller domestic companies. Areas of focus include general advisory matters, restructurings, competition disputes, workers’ co-determination and litigation. Rutger Ploum and Simon Tan jointly lead the practice.

Practice head(s):

Rutger Ploum; Simon Tan

Other key lawyers:

Astrid van Toledo


‘The team is able to translate law into pragmatic approaches’.

‘Response is quick and the team is diverse, with specialists on a diverse set of topics’.

‘The partners I know are really approachable’.

‘Astrid van Toledo is really quick and pragmatic but also conceptual’.

‘Long-term relationship building, understanding of business and critical factors’.

‘Responsive, knowledgeable and pragmatic’.

‘Really hands-on and solution-focused’.

‘Rutger Ploum stands out for not only concrete and to the point advice, but also for being fun to work with’.

Key clients



APM Terminals

Unit 4


BDP Global

Rain Carbon, Inc




United Biscuits / Pladis / Verkade

Marlow Navigation


Greenhouse Group


Bastion Hotels


Performation HOTflo

The firm: Founded in 1995 as one of the first break-away firms in the Netherlands, Ploum is not an average law firm. Its clients will confirm that it is significantly different. The firms strives to support businesses in achieving their objectives. Combining know-how and practical experience to its clients’ advantage is its talent.

The firm focuses on business clients, including national and international organisations in all shapes and sizes – from small businesses to local government bodies, from listed companies to national government. The 85-plus lawyers at Ploum understand what business is about and know what is important. The firm focuses on what matters to business and helping clients achieve their goals swiftly and smoothly. Solving real puzzles is what drives Ploum. Within the traditional world of the legal professions, the firm sets itself apart by analysing issues with a fresh and open mind and providing solutions, not advice. Its reasonable rates, in addition to this pragmatic way of working, mean clients find Ploum a perfect alternative to bigger firms.

Areas of practice: Ploum has all the relevant legal knowledge and experience to be able to advise organizations.

Banking and finance: the team advises on complex financing arrangements as well as on mainstream financing arrangements, both on behalf of issuers and debtors. In addition, Ploum advises on financial services and regulatory matters.

Corporate and M&A: Ploum has an experienced M&A team consisting of seven partners (including notaries) and a pool of experienced associates. We assist buyers and sellers on a daily basis, in deals in a wide variety of sectors, and advise on the whole M&A process. We also regularly act for private equity funds and other investors.

Real estate: our lawyers and civil-law notaries are specialized in all matters relating to real estate. We advise on any property-related project, and will be able to identify the various legal points of attention. Our sole aim in this respect is to find a feasible solution for each organization –  efficiently and with an eye on the costs

Employment: our specialists will advise on every imaginable aspect of individual and collective employment-law matters. Examples include collective labour agreements, appointment or dismissal of directors under the articles of association, strikes or amendments to pension schemes. Our lawyers can also help in the event of reorganisation, restructuring, mergers, takeovers, outsourcing or insourcing.

Administrative, environment and planning: at Ploum, our specialists in general administrative law will be happy to advise and assist in objection and appeal proceedings relating to administrative law and covering a wide variety of matters, including the granting of subsidies, enforcement, public access to government information, government liability and, of course, environmental law. In addition to our hands-on approach, we are especially aware of the political and administrative context in matters pertaining to administrative law.

Fraud and white-collar crime: do you require advice and legal assistance for your company, management or staff in criminal proceedings relating to the environment, industrial and work place accidents, road and water transport, fraud, duties to report, internal investigations and compliance? At Ploum, our team of white-collar crime lawyers has in-depth experience in advising and assisting companies in sectors such as construction, chemistry, petrochemistry, industrial manufacture, IT and transport.

Intellectual property: at Ploum, our specialists can advise and assist in protecting your intellectual property rights. For example, we can file your trademarks and designs with the official authorities worldwide and we can also investigate a trademark’s national and international availability.

Insurance and liability: at Ploum we have in-depth knowledge of insurance practice and we provide advice and assistance on all aspects of insurance: from financial supervision to developing insurance products and from contractual spreading of liability risks to settling claims. Our clients in this field include insurance companies, intermediaries, insured companies, government authorities and experts.

Restructuring and insolvency: If your company or organisation is facing considerable financial problems, either existing or imminent, you – as a director, supervisory director, shareholder or bank – have urgent need of an advisor that focuses on providing some breathing space. At Ploum, our specialists will provide you with fast and effective assistance. We will draw up an action plan – in consultation with you – for one or more of the following, depending on the situation your company is facing.

Department Name Email Telephone
Administrative, environmental law and spatial planning Maayke Maas-Cooymans
Asset finance Stan Commissaris
Asset finance Jolande van Loon
Asset finance and structured finance Lucas Lustermans
Asset finance and structured finance Matthijs Bolkenstein
Banking and finance Lucas Lustermans
Banking and finance Matthijs Bolkenstein
Capital Markets Matthijs Bolkenstein
Commercial contracts Dorine ten Brink
Commercial contracts Dennis Zieren
Commercial litigation and arbitration Dorine ten Brink
Commercial litigation and arbitration Maurice Verhoeven
Financial Regulatory/Supervision
Real estate Stan Commissaris
Real estate Anton van den Heuvel
Real estate Stephan Sluiter
Competition and EU Michel Jacobs
Corporate and M&A Tom Ensink
Corporate and M&A Nick Hessels
Corporate and M&A Stephan Sluijters
Corporate and M&A Albert Wiggers
Fraud and white-collar crime Jouko Barensen
Corporate recovery Vincent Terlouw
Energy Stephan Sluijters
Energy Jolande van Loon
Energy Maayke Maas-Cooymans
Employment and co-determination Rutger Ploum
Estate planning Jolande van Loon
Care Dennis Zieren
Care Michel Jacobs
Care Stan Commissaris
IT and privacy Dorine ten Brink
IT and privacy Dennis Zieren
Insurance Natalie Vloemans
Insurance Maurice Verhoeven
Intellectual property and marketing Willem Leppink
Joint ventures Nick Hessels
Joint ventures Jeroen Terstegge
Procurement Dennis Zieren
Photo Name Position Profile
Mr Jouko Barensen  photo Mr Jouko Barensen Attorney at law
Mrs Jikke Biermasz  photo Mrs Jikke Biermasz Partner, attorney at law
Mr Matthijs Bolkenstein  photo Mr Matthijs Bolkenstein Partner, attorney at law
Mr Stan Commissaris  photo Mr Stan Commissaris Civil law notary, partner
Mrs Alexandra Danopoulos  photo Mrs Alexandra Danopoulos Attorney at law, partner
Mr Tom Ensink  photo Mr Tom Ensink Attorney at law, partner
Mr Jaap Feenstra  photo Mr Jaap Feenstra Of counsel
Mr Nick Hessels  photo Mr Nick Hessels Attorney at law, partner
Mr Michel Jacobs  photo Mr Michel Jacobs Attorney at law, partner
Mr Willem Leppink  photo Mr Willem Leppink Attorney at law, partner
Mr Lucas Lustermans  photo Mr Lucas Lustermans Partner, attorney at law
Mrs Maayke Maas-Cooymans  photo Mrs Maayke Maas-Cooymans Attorney at law, partner
Mrs Deborah Nizamoeddin  photo Mrs Deborah Nizamoeddin Deborah Nizamoeddin (1980) is a member of the corporate practice group. She…
Mr Rutger Ploum  photo Mr Rutger Ploum Attorney at law, partner
Mr Stephan Sluijters  photo Mr Stephan Sluijters Attorney at law, partner
Mr Stephan F.J. Sluiter  photo Mr Stephan F.J. Sluiter Attorney at law, partner
Mr Simon Tan photo Mr Simon Tan
Mr Vincent Terlouw  photo Mr Vincent Terlouw Attorney at law, partner
Mr Jeroen Terstegge  photo Mr Jeroen Terstegge Jeroen specializes in company and corporate law. He has extensive experience with…
Mr Sabin Tigu photo Mr Sabin Tigu Attorney at law, partner
Mrs Astrid Van Toledo photo Mrs Astrid Van Toledo Astrid litigates and advises mainly in the field of employment law. She…
Mr Maurice Verhoeven  photo Mr Maurice Verhoeven Attorney at law, partner
Mrs Natalie Vloemans  photo Mrs Natalie Vloemans Attorney at law, partner
Mr Albert Wiggers  photo Mr Albert Wiggers Attorney at law, partner
Mr Dennis Zieren  photo Mr Dennis Zieren Attorney at law, partner
Mrs Dorine ten Brink  photo Mrs Dorine ten Brink Attorney at law, partner
Mrs Jolande van Loon  photo Mrs Jolande van Loon Civil law notary, partner
Mr Marijn van Tuijl  photo Mr Marijn van Tuijl Partner, attorney at law
Mr Anton van den Heuvel  photo Mr Anton van den Heuvel Attorney at law, partner
Number of lawyers : 85
Contact : Tom Ensink (