Who we are ?

Highly specialised in employment law, CASTEGNARO is one of the leading players in the field, providing a high quality tailor-made service to employers in order to offer creative and excellent solutions to our clients.

As a founding member of Ius Laboris, we offer legal services, both in advice and litigation, in all areas of employment law, in Luxembourg and internationally.

Our Expertise

Human Resources matters are becoming more and more complex every day. That is why we are convinced that only a firm specialised in labour and social law can effectively deal with all legal aspects related to HR.

CASTEGNARO is the natural and preferred contact for HR and in-house lawyers of any company with employees, for pragmatic, rapid and effective solutions.

Our involvement in the creation of the Luxembourg Labour Code further strengthened this expertise.

The firm focuses on all aspects of human capital, as legal advice in the field of HR goes beyond regulation alone. We guarantee an integrated approach, taking into account all legal aspects related to the issues at hand.
Ranking and Awards
What others say about us
Elite Global Alliance (Top Ranked)
Highly commended in the “Global Network of the Year” category
50 Firms Ranked in 4 Continents

Corporate social responsability

Our corporate culture

CASTEGNARO has a strong international presence, in particular through Ius Laboris, although the size of the firm does not detract from a friendly atmosphere conducive to exchanges.

Each lawyer carries out his or her tasks ethically and independently, with the support of more experienced lawyers, mutual assistance being an important value within the firm. Each lawyer and administrative staff member is personally responsible for the values of the firm, which are in particular the following Mutual respect and trust; Ethics; Communication and team spirit; Balance between private and professional life; Personal commitment; Diversity. Since its creation, the firm has been firmly committed to Corporate Social Responsibility (CSR) and Sustainable Development. The firm takes into account social, environmental and economic considerations in its daily operations. The responsible working environment that the firm strives to develop and maintain helps to strengthen teamwork and increase performance.

Our Approach

Our firm is committed to a pragmatic approach, in order to be the true partner of HR and Legal departments in the daily management of human resources. CASTEGNARO distinguishes itself from other law firms in the market by ensuring, for more than ten years, the defence of the interests of employers (companies, associations, self-employed persons, ministries and administrations), and only employers. This choice has enabled it to develop and offer cutting-edge legal services to better meet the needs of its clients, with "out of the box" and tailor-made solutions, in ever shorter formats and deadlines. CASTEGNARO listens to its clients and ensures that it maintains a pragmatic and up-to-date approach to legal issues, so that clients can be sure of receiving a constructive response to their question. Our clients benefit from the know-how of our lawyers through complimentary additional services such as publications, newsletters, newsflashes, seminars and internal training.

Our history

Founded in 2004 by Me Guy Castegnaro, CASTEGNARO-Ius Laboris Luxembourg is proud to have established itself over the last few years as the only "niche" law firm in the field of employment law, at the service of employers, highly and exclusively specialised in all legal aspects of the employment relationship, both in the strict sense of employment law (employment contracts, working hours, terminations, transfer of undertakings, redundancy plans, renegotiation of collective labour agreements, etc. ), as well as in a broader sense (personal data protection, social security, pensions, immigration, company law and taxation of remuneration). CASTEGNARO has grown from a team of 5 lawyers in 2004 to a team of 12 lawyers, including Guy Castegnaro and Ariane Claverie, Partners, and 2 legal advisors, all of whom are fully dedicated to labour law, in the service of employers. We work together, in close collaboration, on an equal footing, in order to offer creative and excellent solutions to our clients.


European Employment Law Association - EELA International Bar Association - IBA Employment Law Specialists Association - ELSA Association des Banques et Banquiers, Luxembourg - ABBL Personnel Officers Group - POG American Chamber of Commerce in Luxembourg - AmCham Institut pour le mouvement sociétal - IMS Forum for the Regulation of Social Europe - RegES

Opinions of our former trainees and employees

"Doing my internship at Castegnaro was an enriching experience, both humanly and professionally. The warm welcome from each of the employees and the working atmosphere contributed greatly to the fact that this internship took place in optimal conditions. The transmission of values, skills and knowledge, the team spirit, and the availability of each member of Castegnaro have particularly enabled me to benefit from a high quality training. Alice MARCHAL | Trainee lawyer at CASTEGNARO January-June 2017 Alice MARCHAL | Trainee lawyer at CASTEGNARO January-June 2017

"CASTEGNARO is a friendly firm with a real policy of integrating its employees. I greatly appreciated the simplicity, the concern for teaching, as well as the availability of each of its members. Working at CASTEGNARO has been a very enriching experience from a human and professional point of view, which has enabled me to carry out interesting and varied work in a very pleasant working environment. " Cindy TOILIER | Lawyer at CASTEGNARO 2015 & 2016

Our Offices

Local experts, global reach

We work with employers to arm them with the knowledge they need to operate in local and international markets.