Castegnaro, member of Ius Laboris > Luxembourg, Luxembourg > Firm Profile

Castegnaro, member of Ius Laboris

Luxembourg > Employment Tier 1

Well-established employment law boutique Castegnaro, member of Ius Laboris has an ‘excellent reputation’ in the local market and is frequently sought out by employers from across a range of industry sectors to provide advice on day-to-day HR matters, litigation and projects. Founding partner Guy Castegnaro has excellent credentials in the market, both in terms of his fee-earning work, as well as his thought leadership and speaking engagements. Other recommended partners include Christophe Domingos, who specialises in collective employment matters and Ariane Claverie, whose broad offering includes advice on terminations, working hours, sickness and social security, data protection and secondment.


The firm has an excellent reputation.’

The firm: Highly specialized in labour law, Castegnaro – Ius Laboris Luxembourg is a law firm which exclusively represents companies and groups of companies from all sectors at national and international level as well as government and municipalities.

Castegnaro is active both in litigation and counsel for all aspects of the employment relationship (social security, corporate, tax and commercial law, personal data protection, immigration, etc).

Widely recognized as the best practice ‘niche’ firm in labour law in Luxembourg, Castegnaro participated in the development of the Luxembourg Labour Code, publishes regularly articles and books, and its members regularly give conferences and seminars.

Castegnaro is founder of the alliance Ius Laboris, the world’s largest and highest ranked employment law practice, with over 1,500 lawyers focusing on HR law based in 59 countries. Castegnaro can therefore enable its clients to access the services of recognised legal firms in a significant number of countries.

Areas of practice: Castegnaro specialises exclusively and to a very high degree in all the legal aspects of the employment relationship and has developed cutting-edge expertise in all fields of employment, labour law, pensions and social security regulations. The firm’s activities cover all aspects of National, European and international employment law as well as corporate, tax and commercial law matters as far as they are directly or indirectly linked to employment.

Castegnaro has developed advanced employment law expertise and offers tailor-made legal services.

Mr Guy Castegnaro photo Mr Guy CastegnaroGuy Castegnaro is Founder & Managing Partner at CASTEGNARO.
Mrs Ariane Claverie photo Mrs Ariane ClaverieAriane Claverie is Partner at CASTEGNARO.
Mr Christophe Domingos photo Mr Christophe DomingosChristophe Domingos is Partner at CASTEGNARO.
Number of lawyers : 12
Ius Laboris
European Employment Lawyers Association (EELA)
International Bar Association (IBA)
Contacts : Guy Castegnaro (
Contacts : Ariane Claverie (
Contacts : Christophe Domingos (

CASTEGNARO – Ius Laboris Luxembourg provides employers with pragmatic efficient and effective HR legal advice, with an experienced team of 14 lawyers specializing in all aspects of the employment relationship. 

Our clients benefit, in Luxembourg and in nearly 50 countries around the world, from: 

  • employment law, social security, taxation of the remunerations, pensions, data protection and immigration assistance, 
  • a coordinated approach by leading law firms; 
  • a consistent high-quality international service. 

CASTEGNARO – Ius Laboris Luxembourg is recognized as leading law firm in Luxembourg and participated in the establishment of the Luxembourg labour code. CASTEGNARO’s employment law specialists are regular speakers at numerous conferences on employment law topics. 

The network 

CASTEGNARO_Ius Laboris Luxembourg is one of the founding members of the alliance Ius Laboris, the world’s largest and highest ranked employment law practice, with over 1500 lawyers focusing on HR law based in 59 countries. 

Ius Laboris offers a high-level international services, enabling Castegnaros‘ clients to access the services of recognised legal firms in each country. 


Central & Eastern Europe: Belarus, Bulgaria, Croatia, Czech Republic, Estonia, Hungary, Kazakhstan, Latvia, Lithuania, Slovakia, Ukraine 

Central & South America: Argentina, Brazil, Chile, Colombia, Mexico, Peru, Venezuela 

Middle East & Asia Pacific: Australia, Bahrain, China, Hong Kong, India, Israel, Saudi Arabia, Singapore, South Korea, Thailand, Turkey, United Arab Emirates 

North America: Canada, United States 

Western Europe: Austria, Belgium, Cyprus, Denmark, Germany, Greece, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Romania, Serbia, Slovenia, Spain, Switzerland, United Kingdom 

At CASTEGNARO-Ius Laboris Luxembourg, we believe diversity is a key contributor to success in the competitive global marketplace and our commitment to diversity is a fundamental element of our firm.

Every single employee, whether a lawyer or a member of the administrative staff, is an ambassador for the firm, and personally responsible for its values, which include in particular the following:

  • Diversity,
  • Mutual respect and confidence;
  • Ethics;
  • Communication and team spirit;
  • Work-life balance;
  • Personal commitment.

Our firm signed the Diversity Charter Lëtzebuerg in 2012 and we are still improving our commitment to diversity.