Who are we?

Lionel assists entrepreneurs and management teams of large companies, mid-cap companies and SMEs in the legal and tax structuring and implementation of their strategic activities (rollout and reorganisation of the business model, mergers and acquisitions, private equity, transfer) in a domestic or international context.

Sandra, who has 25 years of experience working for corporations, the “Big 4” and law firms, brings you, along with her responsive team, tangible and pragmatic solutions to your complex issues of international mobility and international recruitment.

For more than 20 years, Thomas and his team have been assisting clients with their complex projects and issues in relation to employment law. He maintains a lasting relationship with his clients based on trust, responsiveness, pragmatism and a friendly approach. His expertise has been recognised by the top international rankings.

For more than ten years, Aliénor has been advising companies and groups of all sizes on complex employment law matters. She advises them on individual and collective employment relations and represents them in high-stakes employment litigation. She also assists them with personal data protection matters.

After 20 years of practice at Vaughan & CWA, Abdelkader Hamida joined Kopper in 2025 as a partner.

Abdelkader Hamida specializes in collective employment relations management, corporate restructuring, and the setting or the modification of the employees’ complementary welfare protection measures.
In addition to advising on collective employment relations, Abdelkader Hamida also offers legal solutions covering the management of collective and individual litigation in labour law, work-related accidents and diseases, and URSSAF litigation.

Aware of the importance of transmitting knowledge, Abdelkader regularly develops and conducts intra-company training modules on current social issues and recurring topics of labour law such as the employer criminal liability or the redundancy procedures.

For more than 20 years, Thomas and his team have been assisting clients with their complex projects and issues in relation to employment law. He maintains a lasting relationship with his clients based on trust, responsiveness, pragmatism and a friendly approach. His expertise has been recognised by the top international rankings.

Aurélie is an experienced professional with 10 years of Big 4 experience in France and abroad. She supports a broad portfolio of international clients and their employees with international mobility, compensation and benefits matters. She provides responsive and pragmatic advice and hands-on support in implementing their projects.

After working as a lawyer and director at Vaughan Avocats with Abdelkader Hamida, Charlotte Gosselin joined Chassany Watrelot & Associés in 2021 and after KOPPER in September 2025. Her background allows her to have a multilateral approach to human resources: after having been a Human Resources Manager at the Pierre and Marie Curie University for four years, Charlotte Gosselin trained in labour law. Charlotte Gosselin's practice focuses on collective employment relations (employee representatives, collective bargaining, restructuring, professional elections) as well as on individual employment relations.

Maureen began her career as a lawyer at the employment department of Trajan Avocats, before joining Abdelkader HAMIDA's team in 2019 at Vaughan Avocats, then at CWA and now at KOPPER, since September 2025.

Maureen advises and assists French and international clients on individual and collective labour relations and assists them in litigation.
In particular, she assists companies and individuals in the management of individual labour relations (employment contracts, disciplinary procedures, dismissals, remuneration) and collective labour relations (collective bargaining, staff representatives, professional elections) and assists them during litigation before all the competent jurisdictions.

Samya advises clients on the tax and employment consequences of the international transfer of their employees (amending contracts, calculating remuneration, coordinating tax and employment issues with a network of foreign partners). She also runs training modules for companies or for Toulouse Business School.

Anne-Julie advises French and international clients on employment law matters, both in an advisory capacity and in litigation.

Caroline advises companies and their managers on their creation, development and growth projects, as well as on restructuring operations.

Graduated with a Master’s degree (LL.M.) in Private Litigation from the University of Caen and trained at HEDAC (Haute École des Avocats Conseils), Charles-Xavier BEKUS has been a qualified lawyer since November 2021.

He began his career at FROMONT BRIENS and LITTLER FRANCE, two leading law firms specialized in employment law, where he developed strong expertise in labor and employment matters.

He joined KOPPER in September 2025.

Charles-Xavier BEKUS advises French and international companies on all aspects of employment law, including both individual and collective labor relations, and represents clients in litigation. He is involved in both advisory and contentious matters.

Cyrielle assists you with all employment issues that have arisen or may arise within your company: upstream, through operational advice, or if necessary in the context of litigation before the employment courts.

Guillaume advises on national and international corporate tax matters, particularly mergers and acquisitions and group reorganisations. He also assists executives with wealth optimisation and represents them in disputes with the tax authorities.

Laura holds a bachelor’s degree in Law and Legal Culture from the Catholic University of Lille, as well as a master’s degree in Labor Law from the University of Lille II, which she earned in 2022. She has been a member of the Paris Bar since 2025.

Before joining KOPPER, Laura worked as a labor law attorney in a variety of settings, including law firms and labor unions, where she developed expertise in individual and collective labor relations.

Laura practices labor law and advises companies on both individual and collective labor relations, providing support in both advisory and litigation matters.

Before joining Kopper, Léa worked as a legal counsel for various public entities (the City of Paris and the Nice Côte d’Azur Metropolitan Area).

As part of her training in labor law, she completed several internships at the law firms MENLO Avocats and CAPSTAN Avocats, as well as in-house at the legal departments of RGIS France and Action Logement.

She advises French and international companies on all individual and collective labor issues, both in litigation and in an advisory capacity.

Lydia has been a member of the Paris Bar since 2023. She specialises in employment law and social security law, providing both advisory and litigation services.

She began her career by building up a strong practice in employment law within the aviation sector, which enabled her to gain expertise in a wide range of issues and a practical understanding of demanding environments.

Before joining KOPPER, Lydia practised at several employment law firms, where she developed expertise in individual and collective labour relations as well as regular experience in negotiation. She advises companies, executives and employees at every stage of the employment relationship.

With a degree in business law and taxation, she has a cross-functional view of the business, enabling her to grasp the full range of employment-related issues.

Nadia is a lawyer in the International Mobility team. She holds a Master’s degree in Tax Law and a university diploma in International Tax Law. She advises on all issues relating to international employee transfers, including tax, employment law and social security law. She provides tailored support in line with each client’s needs.

Vincent assists companies and their managers in their creation, development and business transfer projects, as well as in structuring their groups, carrying out mergers and acquisitions and raising capital.

Passionate about tax, Juliette moved into international mobility in 2023. She advises companies on the tax, social security and legal issues associated with international employee transfers. Dynamic and attentive, she guides clients towards the most appropriate solutions and supports them in implementing their projects.

Trained in international mobility by the Institut Magellan and with four years of experience as a Legal Advisor at Cercle Magellan, Salomé assists companies with the management of international employee transfers. She analyses the employment law, social security and tax issues arising from these international transfers.

Yoko is a Coordinator within the International Mobility department, assisting companies with the management of international employee transfers. She is trilingual in French, English and Japanese.