Klaas Wiersma
Partner - Attorney at law

Klaas Wiersma

Klaas Wiersma, attorney at law, is the chairman of the Employment & Benefits practice group in the Netherlands. He has over 20 years’ all-round experience in employment law, with a particular focus on the employment aspects of, mostly international, M&A-deals, co-determination procedures, restructurings and collective dismissals, and cross-border employment.

About Klaas Wiersma

Klaas has a strong reputation as an employment specialist for highly sensitive matters. He regularly advises and litigates on the dismissal of managing directors and other top management. He.also has expert knowledge in management and employee participation structures and as such is a member of the firm-wide Corporate Governance Team.

Klaas is a frequent speaker at seminars and courses designed for attorneys addressing various aspects of employment law. He regularly publishes articles and comments in the employment case law journal (JAR). He is also a co-author of a book which deals with the new employment legislation which came into force as of 1 July 2015. The updated edition was recently released.

Klaas has been ranked as Leading Individual in the Legal 500 EMEA 2020 edition and as Band 1 in Chambers Europe 2021.

What others say about Klaas

Legal 500: "Klaas Wiersma is a very strong professional whose attitude, personality and working style make him a great advisor in separation matters involving executive management. He is hands-on, swift, always available and very keen to do what needs to be done, avoiding unnecessary work." (2021)

Chambers Europe: Klaas Wiersma moves up in the rankings this year with a strong work portfolio and glowing client praise. His solution-driven style is remarked upon by clients, one calling him "hands-on, swift, always available and very keen to do what needs to be done." He advises on the employment aspects of M&A transactions, such as employee transfers, as well as collective and individual dismissals. (2021)

Legal 500: "I really appreciate working with Klaas Wiersma, because of his very high degree of services and the ability to help us in a practical way with the (difficult) employment law issues we have to deal with." (2020)

Legal 500: "Klaas Wiersma is always available and has a very practical approach, he helps us resolve employment issues quickly and efficiently." (2020)

Chambers Europe: "Klaas Wiersma boasts extensive experience acting for large corporates on cross-border labour law matters, including mobility structures and flexible working structures. Wiersma is acclaimed by clients as a "great lawyer who is responsive and gives good advice." Another interviewee states that he is "very pleasant to work with, very knowledgeable, down-to-earth and a hands-on problem solver." (2020)

Legal 500:"The 'hands-on and solution-driven' team at Loyens & Loeff 'has a can-do mentality' and 'excellent litigator' Klaas Wiersma is considered to be 'the engine behind his smoothly running team'." (2019)

Chambers Europe:
"One client says that Wiersma is 'solution-driven, responsive and available,'while another notes: 'He is excellent at distilling complex situations into a context that is logical and easy to understand." (2019)

Chambers Europe: "Clients view him as a 'very practical lawyer who has a lot of knowledge upfront,' and who provides 'short and direct advice.


  • Nederlandse Orde van Advocaten (NOvA),
  • Vereniging Arbeidsrecht Advocaten Nederland (VAAN)
  • European Employment Lawyers Association (EELA)
  • Vereniging voor Arbeidsrechtadvocaten Amsterdam (VvAA)


  • Post-graduate course Employment law (with honours), Grotius Academy, 2005
  • Dutch law, University of Groningen, 2000


  • Dutch
  • English

T: +31 20 578 59 60
E: [email protected]


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