Lawyers in Belgium

Grégory Ernes

Partner

ALTIUS

Guido De Wit

Consultant Partner

Linklaters

Guillaume Couneson

Partner

Linklaters

Guillaume Croisant

Managing Associate

Linklaters

Guillaume Delfosse

Counsel

Tiberghien

Guillaume Milde

Guillaume is a senior associate in our Corporate & Finance team. He specialises in corporate and commercial law, with a particular focus on corporate restructuring and mergers and acquisitions. He advises clients on corporate and commercial matters in both Belgian and cross-border transactions involving a Belgian element. Guillaume has experience across various sectors, including life sciences and energy. Before joining Quinz in November 2025, Guillaume worked at PwC Legal, where he was seconded to Fluxys between May and December 2021, gaining valuable in-house experience and developing further expertise as external legal counsel in the energy transportation sector. He subsequently worked at NautaDutilh in both Amsterdam and Brussels. Since 2023, he has also been a teaching assistant in corporate law at the Jan Ronse Institute (KU Leuven). Guillaume is a member of the Brussels Bar since 2018.

Quinz

Guillaume Mockel

Guillaume Mockel advises leading airlines, transport companies, (re)insurers and major policyholders on contentious and non-contentious matters. He also assists leading airlines on their contractual and regulatory activities and represents them before the Belgian courts in matters relating to passenger claims, noise pollution and contractual disputes. Guillaume was admitted to the Brussels bar in September 2021. Guillaume gained experience at reputable national and international firms based in Brussels, specializing in transport and aviation law. Guillaume also successfully completed an internship at the Belgian Civil Aviation Authority. He practices in French and English, and is proficient in German. He contributed to Kennedys’ Global Legal Handbook, one of our most popular guides, which outlines the main legal and procedural issues that case handlers may encounter when dealing with claims across 53 jurisdictions globally. Guillaume holds a Master of Laws in International and Public Law from the University of Brussels (ULB) and graduated from Maastricht University in the Netherlands and Humboldt-Universität zu Berlin in Germany, where he studied European law.

Bournonville Grigorieff

Guillaume de Villegas

Guillaume is a counsel in our Brussels office where he has experience in all types of IP matters, with a particular focus on trade mark, copyright, design and patent law in the life sciences, retail & consumer, food & beverage, luxury goods and media & entertainment sectors. Over the years, Guillaume has developed in-depth expertise in managing complex litigation in trade mark, copyright, design and patent law, as well as in various commercial disputes, ranging from distribution to sponsorship and beyond. Guillaume has successfully represented clients before national courts, administrative bodies (EUIPO and BOIP) and EU courts (Court of Justice of the European Union and General Court of the European Union). Guillaume regularly advises clients on the implementation of a global trade mark and design policy and strategy, often hand in hand with his expert colleagues across the Bird & Bird network in order to offer a tailor-made solution. He recognises the value of innovative and dynamic tools to manage portfolios in a cost-efficient manner. Guillaume has also assisted clients on a range of transactional matters, including the drafting and negotiation of IP agreements, such as license agreements, collaboration agreements, transfer agreements, clinical trial agreements, etc. He always strives to provide constructive and pragmatic advice, weighing the risks linked with every option. His expertise in litigation has helped him a great deal in that respect. Guillaume has experience counselling clients on various legal issues involving trade practices and consumer law protection (e.g. vetting of marketing campaigns and packaging of products, review of general terms and conditions, etc.).

Bird & Bird

Guy Block

Partner With more than thirty years of experience in energy and transport law, Guy Block heads Janson's Energy, climate change and mobility Department. Among other things, Guy has been involved in the liberalization of the electricity and gas markets in European Union member states, including Belgium, France, Luxembourg, Romania as well as Turkey, Iran, Morocco, Qatar, Madagascar and Tajikistan. He is the author of various legislative and regulatory texts. He has also participated in several international conferences and published a large number of articles and books on energy law. His main areas of activity are the liberalisation of the energy (electricity and gas) and transport (rail, air and road) markets. Guy regularly acts before the civil and administrative courts, as well as before the Court of Justice of the European Union. He has extensive experience in assessing, drafting and interpreting legislation relating to the liberalisation of energy markets, drafting energy supply contracts, B.O.T contracts for power plants (gas turbines, wind farms, nuclear, coal), LNG, pipeline cases, as well as in drafting financial contracts. Guy acts as a national and international arbitrator before the ICC, LCIA, IAI and ASA. Guy is born in 1959 and obtained the degrees of Doctor of Laws (PHD), Master of Laws (LLM), Master Degree in Transport and Certificate of English Law after having obtained a Licence en Droit at the University of Liège. References Assistance to Belgian federal and regional governments with the implementation of the Protocol of Kyoto and the transposition into federal and regional law of multiple European Directives Assistance to the government of Tajikistan with reforming its energy sector with financing from the Asian Development Bank Assistance to the Belgian regulator with tariff structures in the electricity and gas sectors Advice on close market issues to new entrants in the Belgian energy markets (access and access responsible contracts, contacts with regulatory authorities) Advice to a major gas supplier on access to and participation in the Zeebrugge Hub Assistance to a gas and electricity supplier with obtaining purchased green certificates Advice to major Belgian industrials on the acquisition of a significant share of electricity production capacity output (approximately 14 TWh/year) in return for a 20-year investment, and on the possible erection of an 800 MW clean coal power plant Assistance and strategic advice to a foreign investor on the construction of a high-efficiency cogeneration unit in Romania Assistance with the drafting of contracts and general conditions for supply of gas and electricity to industrial, small and medium sized and residential consumers at the Belgian federal and regional levels Assistance to major gas actors with due diligence on up-stream LNG installation financing Drafting of legislation relating to the phasing out of nuclear power plants and to funding for decommissioning Litigation on behalf of a major electricity producer and supplier relating to electricity tariffs Litigation relating to renewable support in the Flemish Region (green and cogeneration certificates) Litigation before state courts, the Council of State and arbitration bodies relating to the opening up of the electricity market, including competition issues, green certificates, right of access, obligations of TSO... Establishment of a European consortium for rail transport by means of high speed lines (including financial, technical and legal issues) Creation of a joint venture for the establishment of a multimodal road and rail company Numerous legal cases relating to air transport and the CMR and Warsaw conventions (including parcel transport)

Janson

Guy Soussan

Partner - Guy Soussan has more than 20 years of experience advising clients on EU and international reinsurance regulatory issues. He advises insurers and reinsurers, captives, and intermediaries on EU regulatory, legal, tax, antitrust, international trade, and compliance issues. In this role, he has assisted leading European and non-European groups in setting up and conducting business in Europe in order for them to benefit from the EU’s Single Market rules in insurance. Guy also focuses on prudential supervision of EU and international reinsurance undertakings under Solvency II, where he frequently provides advice on governance, the setting-up of new structures, group supervision, and the treatment of third-country groups. Additionally, Guy advises EU and French export control regulations, including controls and licensing regimes for military, commercial products, and technologies. He also provides advice and assistance with EU economic sanctions targeting specific countries such as Iran, Libya, Syria, and most recently, Ukraine, and Russia. His experience covers a wide range of industries, including manufacturing, energy, telecommunications, banking and insurance, petroleum and petro-chemicals, aerospace, and defense.

Steptoe LLP

Gwen Bevers

Managing Partner

Scale

Géry Bombeke

Géry Bombeke heads the Tax Practice Group at Baker McKenzie Belgium. He is based in the Brussels office. He joined Baker McKenzie in 2004, after several years of experience in a Big 4 company and its related law firm. He became partner in 2010 Géry advises our clients on a broad range of corporate income tax issues, both international and domestic. Géry's practice focuses on transfer pricing, where he assists clients with strategy, design, implementation and documentation. He also regularly negotiates unilateral and bilateral Advance Pricing Agreements (APA), and assists in transfer pricing audits and disputes, including mutual agreement procedures. In addition to transfer pricing, Géry is also a tax specialist in corporate restructurings such as mergers and de-mergers, etc. where he assists our clients on pre- and post-acquisition restructurings, corporate simplifications, etc. Being based in the centre of the EU, Géry centralizes and coordinates for most of his international clients the firm's tax assistance in the region.

Baker McKenzie BV/SRL

Hadrien Chef

Partner, Belgium Hadrien specialises in corporate and security law, corporate finance, mergers and acquisitions (M&A), venture capital, public offerings and corporate reorganisations. Hadrien also acts as a litigator in these matters and in market abuse disputes. Hadrien also assists in setting-up, reorganising, acquiring, or liquidating business ventures in Belgium.

Osborne Clarke

Hakim Boularbah

For more information, please click the following link: Hakim Boularbah | Loyens & Loeff (loyensloeff.com)

Loyens & Loeff

Hakim Haouideg

Hakim is a partner in the intellectual property and technology department in Fieldfisher's Brussels office.

Fieldfisher

Hanne Verhoeven

junior legal advisor advisory and transactional work in the field of company law and non/social profit law (partnerships, establishements, restructurings, liablity, employment law)

Impact lawyers

Hanne Verlinden

Counsel

Tiberghien

Hannelore Buelens

Quinz

Hannelore Matthys

Hannelore Matthys is a partner in the transactions (corporate M&A) team. She focuses on corporate law with an emphasis on cross-border acquisitions and restructuring work. Her experience spans a wide range of sectors, including agriculture, renewable energy, life sciences and insurance. Her experience includes acting for Sopra Steria Group on its recommended all-cash public offer for Ordina, acting for Elicio in relation to several successful projects, including floating offshore wind farm tenders ScotWind Leasing (Scotland) and A05 (France).

Van Bael & Bellis

Hannes Casier

Hannes Casier is head of Argo's private client group. He advises high net worth clients and their family businesses on a variety of Belgian and cross-border wealth structuring issues.

ARGO Law

Hans Dhondt

Partner Hans Dhondt is partner at Janson since 2012 en co-heads the IP, IT and Trade practices department. Hans has over 20 years of experience in advising and assisting clients in all aspects of IP protection (advise, (cross-border) litigation, contracts, protection strategies, IP audits...), in drafting and negotiating complex agreements (license, SaaS, technology transfer, IT outsourcing, software development...), and in all aspects of data protection (GDPR compliance) and trade practices (advertising, distant sales, pricing, consumer protection...). He also represents clients in (national and international) dispute resolution and is an arbitrator and a third-party decider in domain name disputes. His clients are active in various industries, including luxury, fashion, banking and finance, retail, engineering and food. Hans has published, has lectured and held seminars on various subjects relating to intellectual property, fair trade practices, media and entertainment law and privacy. References Advising and representing a UK based multinational active in the production and distribution of vitamins and food supplements in a trademark conflict with a direct competitor before the General Court of the European Union Advising and assisting HomeSend, a money remittance HUB and licensed payment institution in Belgium (a subsidiary of MasterCard) in its negotiations and contracting with various IT suppliers Assisting and representing a very well-known fashion company (one of the global market leaders) in a multijurisdictional copyright and trademark conflict with an Italian, a French, an American and a Belgian company that all sell the same products that constitute an infringement upon the copyrights and trademark rights of our client Advising and assisting a very well-known multinational large-scale non-food retailer, specialized in the distribution of consumer products and services (with at the time nearly 1,000 stores spread over The Netherlands, Belgium, Luxembourg and the United Kingdom) in drafting and negotiating a complex IT agreement (and multiple ancillary agreements) with a leading global end-to-end provider of services, software and hardware for the financial and retail industries. The contract negotiations took several months and took place in Belgium, in Germany and in The Netherlands. The agreements relate amongst to GAP analyses, software license and development, hardware supply, implementation services and maintenance services

Janson

Hans Gilliams

Senior Partner

Eubelius

Hans Graux

Partner. Privacy & data protection; IT, internet, e-signatures, e-security, e-authentication, identity management and trusted services; e-government; open source software; cloud services; digital copyright.

Timelex

Hans Van Bavel

Partner

Stibbe