Our people

Guy Castegnaro

Avocat à la Cour

French - German - English - Luxembourgish

My biography:

Guy Castegnaro is the founder of CASTEGNARO - Ius Laboris Luxembourg, the first employment law niche firm in Luxembourg and founding member of the international alliance Ius Laboris, Global Human Resources Lawyers.

Guy was chairman of the E.E.L.A (European Employment Lawyers Association) from 2011 till 2015.

He is the author and co-author of various articles and books on employment law.

Guy is also a speaker and a chairman at various conferences on employment law topics. He is teaching Luxembourg social security law at the University of Luxembourg as well as Luxembourg employment law in the framework of the “Cours Complémentaires en Droit Luxembourgeois” for the future Luxembourg lawyers. Guy is also teaching Luxembourg employment law at the Sacred Heart University Luxembourg and at the Université de Lorraine in France.

Awards & Recognition:

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Chambers & Partners, 2021 edition:

Guy Castegnaro  is rated by clients for his meticulousness, one calling him "very precise," adding that he "brings a lot of comfort" to work with. He is well practised across the spectrum of employment law matters, including social dialogues.




The European Legal 500, 2021 edition:

Boutique employment law firm Castegnaro, member of Ius Laboris has developed a strong reputation in the market advising domestic/multinational corporates and financial services entities on their Luxembourg-related employment requirements. Christophe Domingos has particular expertise advising employers on collective redundancies and social plans, and also regularly represents clients in court hearings. Founder and managing partner Guy Castegnaro is also recommended.





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Who's Who Legal, 2019 Edition:

Guy Castegnaro  was named as one of the six recommended experts by the " Who's Who Legal Labour, Employment & Benefits 2019 " for the whole of Luxembourg.



The Legal 500 EMEA, 2020 edition:

The 11-strong team at employment boutique Castegnaro, member of Ius Laboris has the strength-in-depth and knowledge to advise corporates across the full spectrum of their Luxembourg employment needs.  'Vastly experienced' team head Guy Castegnaro has both contentious and non-contentious expertise. Recently promoted partner Christophe Domingos is particularly accomplished advising on collective employment and remuneration matters.

Chambers & Partners, 2020 edition:

Guy Castegnaro, ranked "Eminent Practitioner",  maintains a noted reputation in the Luxembourg employment space. Interviewees describe him as one of the "leaders in Luxembourg" for employment law. 

The Legal 500 EMEA, 2019 edition:

Employment law boutique Castegnaro, member of Ius Laboristen-strong offering has the strength in depth to provide an “excellent service” to domestic and multinational employers on employment issues associated with business reorganisations, collective bargaining, compensation and benefits, among other sensitive issues”. Me Castegnaro, Me Ariane Claverie, Co-Partner at the firm, and Me Christophe Domingos were all announced “Recommended lawyers” in employment law in Luxembourg. 

Chambers & Partners, 2019 edition:

Guy Castegnaro is the founder and managing partner of the firm, and has a venerable reputation in the employment space in Luxembourg. "Guy Castegnaro is very good with negotiations," reports one impressed observer. He offers significant experience in both contentious and non-contentious employment mandates.

The Legal 500 EMEA, 2018 edition:

"Castegnaro, member of Ius Laboris regularly advises clients on the employment issues associated with business reorganisations including instances which involve redundancy processes as a result of the relocation of activities to another country. The ‘very knowledgeableGuy Castegnaro and Ariane Claverie are the principal contacts and Christophe Domingos is ‘excellent at implementing staff reduction plans’."

Chambers & Partners, 2018 edition:

Founding partner Guy Castegnaro has a long-standing reputation in the Luxembourg employment law space for advising clients on a wide range of issues including both contentious and non-contentious labour law matters. Sources describe him as "recognised as an expert in the field.”

The Legal 500 EMEA, 2017 edition:

Jointly led by founding partner Guy Castegnaro and Ariane Claverie, boutique employment firm Castegnaro, member of Ius Laboris has a good pedigree in the market acting for employers across a range of matters, including on issues relating to transfers of undertakings and dismissal procedures. Castegnaro recently assisted a large IT company with implementing a voluntary leave programme.

Chambers & Partners, 2017 edition:

Firm founder Guy Castegnaro advises clients on a wide range of employment issues, as well as representation in disputes. Clients recommend him for his exceptional knowledge of employment law, commenting that he has "absolute mastery of labour law, including jurisprudence."

Curriculum Vitae:

Advanced Course of Law (Centre Universitaire de Luxembourg) - Master of Laws (LL.M.) in German Law (University of Kiel, Germany, 1993) Master of Laws (University of Paris I, Panthéon-Sorbonne, 1991).

Avocat à la Cour admitted to practice before the High Court of Justice – Member of the Luxembourg Bar Association - Founding member and member of the Board of Ius Laboris, an alliance of leading Human Resources law practitioners, with member firms in over 43 countries and coverage in more than 100 countries - Member of the Executive Committee of RegES (Forum pour la Régulation de l'Europe Sociale) – Founding member and Chairman of the Board of the E.E.L.A. (European Employment Lawyers Association) – Member of the “Association Henri Capitant des Amis de la Culture Juridique Française” – Founding member and Member of the board of E.L.S.A. (Employment Law Specialists Association, Luxembourg) - Member of the Industrial Relations and Social Affairs Committee of the A.B.B.L. (The Luxembourg Bankers' Association).

Conferences and teaching activities:

Speaker at numerous conferences on employment law topics, Mr Castegnaro is also teaching Luxembourg labour law.

He is teaching more particularly social security law at the University of Luxembourg.

Published works:

Acquiring a company in Luxembourg: Employment implications (European Corporate Lawyer, London 1997) – L’étranger dans la vie du travail (Bruylant, Brussels 1998) – Le petit manuel du droit du travail luxembourgeois (Luxembourg, 1999)   –  Droit du travail luxembourgeois   (Editions Paul Bauler, 2002) – Business Transfers and Employee Rights, Luxembourg Chapter (LexisNexis Butterworths, UK, 2006) - Arbeitsrecht in Luxemburg (Editions Paul Bauler, 2007) - Redundancy law in Europe, Luxembourg Chapter (Kluwer Law International, 2008) - Hiring the best qualified and most talented employees, Luxembourg Chapter (Kluwer Law International, 2008) - Code du travail annoté (Legitech, 2009) - La loi applicable aux contrats de travail internationaux: le nouveau réglement européen du 17 juin 2008 sur la loi applicable aux obligations contractuelles (Bruylant, Brussels, 2009) - Arbeitsrecht in Europa, Luxembourg Chapter (Dr. Otto Schmidt Verlag, Köln, Germany, 2010) - Code du travail annoté (Legitech, 2010) - Arbeitsrecht in Luxembourg (Editions Paul Bauler, 2010) - Le droit de grève au Luxembourg (Les cahiers du droit luxembourgeois, 2010) - Employment in Luxembourg, A practical guide to Luxembourg employment and social security law (Editions Mike Koedinger, 2010) - Relations collectives de travail au Luxembourg (Legitech, 2015) - Monthly contribution (article) on the latest employment law issues in AGEFI – Contributions to World Bank, Doing Business report - Luxembourg correspondant for Liaisons Sociales Europe and Planetlabor.com– Creation of a database regarding Luxembourg employment law case law, Legiwork.

Mr Guy Castegnaro participated in the establishment of the Luxembourg Labour Code.



Insights by Guy Castegnaro
Aucune loi n'impose la vaccination
24 Sep 2021 | Read more
Impfflicht: Dierf en Employeur verlaangen, datt ee sech impfe léisst?
06 Sep 2021 | Read more
Tout travailleur a droit au respect de sa vie privée
17 Mar 2016 | Read more
Is a ixed-term employment contract an indefinite contract with a definite duration?
21 Jul 2015 | Read more