Our rankings and awards
Legal 500 : Employment – TIER 3
“The team at TNDA Avocats provides advice on a wide range of labor law issues, including workplace accidents and occupational diseases, collective bargaining, labor compliance, and criminal labor and corporate law. Nicolas Durand-Gasselin heads the labor law department and is particularly sought after for crisis management. Guillaume Verdier, co-head of the department, has developed strong expertise in occupational health law, while Martine Rivereau-Trzmiel, also a co-head, is a key contact within the firm.
Editorial comment from Legal 500”
Editorial Legal 500, 26/03/2026
Practice leaders:
NICOLAS DURAND-GASSELIN
Lawyer, Partner, Manager
GUILLAUME VERDIER
Lawyer, Partner, Manager
MARTINE RIVEREAU-TRZMIEL
Avocat, Of Counsel
Testimonials,
collected independently by the Legal 500 research team:
« TNDA Avocats delivers a particularly high level of technical advice and in-depth knowledge of case law. The support we provide, on complex issues and in often tense situations, is particularly well adapted to the needs of the company, its organization and its challenges. Compared with other more “integrated” and generalist firms, TNDA’s approach is resolutely customized and tactical. » (2025)
“Fast turnaround times. Practical advice, backed by expertise in labor litigation.” (2026)
« Nicolas Durand-Gasselin is a specialist in health issues. » (2025)
“Sound legal advice, but above all, excellent risk assessment. Highly responsive and always available.” (2026)
« Guillaume Verdier stands out for his high technical skills and his ability to propose practical, effective solutions to problems. He is a pugnacious and persuasive man » (2025)
“We’ve been working with Attorney Martine Rivereau for several years now, and our collaboration has been fantastic! She’s an outstanding professional with extensive expertise.” (2026)
« Extensive expertise in social security litigation, particularly concerning asbestos risks. » (2025)
“We have been working primarily with Mr. Verdier for about ten years. He has always provided us with valuable insights and perspectives on the issues we face, presented in a way that is accessible to Anglo-Saxon managers who prefer not to get bogged down in the intricacies of French law. In this context, Mr. Verdier stands out for his ability to quickly propose very concrete solutions and adapt them in real time if necessary. This pragmatism and responsiveness have led us to expand his services to cover all aspects of labor law and to all companies within the France group.” (2026)
« What sets Guillaume Verdier apart in particular is his ability to combine technical mastery with a friendly approach. » (2025)
“A team that’s always responsive. Relevant legal advice, with a constant focus on providing the best possible solution for each individual case. Smooth and direct communication.” (2026)
« Martine Rivereau-Trzmiel and Nicolas Durand Gasselin: recognized expertise in labor law negotiations, consulting and litigation. » (2025)
“The team’s main strengths are its responsiveness and its ability to propose solutions and implement them in any context or situation.” (2026)
« Nicolas Durand-Gasselin: Not only does he manage individual litigation files and meticulously prepare the pleading file with defense arguments, he also handles the pleading of cases. » (2025)
« The team is highly responsive to different situations and very pragmatic in its approach to cases. Their ability to take on contentious cases and establish a defense strategy is invaluable.» (2025)
Testimonials,
collected independently by the Legal 500 research team:
« TNDA Avocats delivers a particularly high level of technical advice and in-depth knowledge of case law. The support we provide, on complex issues and in often tense situations, is particularly well adapted to the needs of the company, its organization and its challenges. Compared with other more “integrated” and generalist firms, TNDA’s approach is resolutely customized and tactical. » (2025)
“Fast turnaround times. Practical advice, backed by expertise in labor litigation.” (2026)
« Nicolas Durand-Gasselin is a specialist in health issues. » (2025)
“Sound legal advice, but above all, excellent risk assessment. Highly responsive and always available.” (2026)
« Guillaume Verdier stands out for his high technical skills and his ability to propose practical, effective solutions to problems. He is a pugnacious and persuasive man » (2025)
“We’ve been working with Attorney Martine Rivereau for several years now, and our collaboration has been fantastic! She’s an outstanding professional with extensive expertise.” (2026)
« Extensive expertise in social security litigation, particularly concerning asbestos risks. » (2025)
“We have been working primarily with Mr. Verdier for about ten years. He has always provided us with valuable insights and perspectives on the issues we face, presented in a way that is accessible to Anglo-Saxon managers who prefer not to get bogged down in the intricacies of French law. In this context, Mr. Verdier stands out for his ability to quickly propose very concrete solutions and adapt them in real time if necessary. This pragmatism and responsiveness have led us to expand his services to cover all aspects of labor law and to all companies within the France group.” (2026)
« What sets Guillaume Verdier apart in particular is his ability to combine technical mastery with a friendly approach. » (2025)
“A team that’s always responsive. Relevant legal advice, with a constant focus on providing the best possible solution for each individual case. Smooth and direct communication.” (2026)
« Martine Rivereau-Trzmiel and Nicolas Durand Gasselin: recognized expertise in labor law negotiations, consulting and litigation. » (2025)
“The team’s main strengths are its responsiveness and its ability to propose solutions and implement them in any context or situation.” (2026)
« Nicolas Durand-Gasselin: Not only does he manage individual litigation files and meticulously prepare the pleading file with defense arguments, he also handles the pleading of cases. » (2025)
« The team is highly responsive to different situations and very pragmatic in its approach to cases. Their ability to take on contentious cases and establish a defense strategy is invaluable.» (2025)
Le Point
April 2025: For the sixth year running (2020-2021-2022-2023-2024-2025)
TNDA is ranked by Le Point magazine in the Palmarès des avocats as one of the best law firms in France in the field of employment law (employers’ side) The best law firms by speciality and by bar 2025
Le Figaro Partner
TNDA is one of the firms featured in the January 31, 2025 issue of Figaro Partners, Droit social, Bien choisir son cabinet conseil.
Décideurs magazine
Décideurs Magazine 2025 Ranking – Social Relations & Labor Law
Best Lawyers in France
2026 edition
Best Law Firms in France :
TNDA is listed in the ranking of the Best Law Firms in France, a new Best Lawyers distinction that recognizes the entire legal department of a firm, by specialty and jurisdiction.
This ranking is based on six studies that gather the opinions of clients and lawyers.
Legal Manager’s Guide
Listed in the compliance and labor law directory.