Mr Mario DI STEFANO > DSM Avocats à la Cour > Luxembourg, Luxembourg > Lawyer Profile

DSM Avocats à la Cour
BP 2648, 1026 LUXEMBOURG

Work Department

Corporate, M&A, Real Estate and Construction, Tax and Employment.


Managing Partner – Avocat à la Cour and Rechtsanwalt


Mario DI STEFANO is the Founding and Managing Partner of DSM Avocats à la Cour. With a career spanning over 25 years in the legal field, Mario is recognized for his expertise in Commercial and Corporate Law, M&A, Real Estate, Tax, and Labor Law. He is a member of the Bars of Luxembourg (Grand Duchy of Luxembourg) and Frankfurt am Main (Germany).

In 2004, Mario founded DSM Avocats à la Cour, which has since grown to become one of Luxembourg’s most reputable independent Luxembourg business law firms, boasting a team of over 40 dedicated lawyers and staff.
Mario’s dedication to delivering exceptional legal services has earned him recognition and accolades from leading legal directories.

Mario is actively involved in numerous professional organizations and legal networks. He serves as the President of AmCham Luxembourg’s Real Estate Committee and is a member of esteemed bodies such as LuxReal and the Luxembourg Arbitration Association, among others. Mario’s firm is a member of five global legal networks, enhancing the ability of the firm to serve clients.
Mario Di Stefano is an author and speaker on legal topics, frequently contributing articles and insights to publications such as NeoMag and AGEFI Luxembourg.

Mario DI STEFANO’s passion for law, combined with his dedication to excellence, makes him a trusted advisor to national and international clients.


English, French, German, Italian and Luxembourgish


  • President – Real estate committee of the American Chamber of Commerce in Luxembourg
  • Member – British Chamber of Commerce for Luxembourg
  • Member – LuxReal
  • Member – Luxembourg Arbitration Association
  • Member – Institut Luxembourgeois des Administrateur
  • Editorial board – Real estate magazine by Legitech
  • DLWI
  • ALFA International
  • SCG – State Capital Law Firm Group
  • AEL – Association of European Lawyers
  • International Bar Association
  • WIRAS Verbund


1995 Luxembourg law exam
1990 Second State Examination (Zweite Juristische Staatsprüfung), Rhineland–Palatinate, Germany
1987 Law diploma after First State Examination (Erste Juristische Staatsprüfung), Trier University Germany

Lawyer Rankings

Luxembourg > Real estate and construction

(Leading individuals)

Mario Di StefanoDSM Avocats à la Cour

Real estate is a core area of focus for independent law firm DSM Avocats à la Cour and the firm has developed deep market knowledge and connections with core stakeholders in the space, as a result of its involvement throughout the life cycle of office, commercial and residential projects. Key to the firm’s success in the area is the work of ‘outstanding’ team head Mario Di Stefano, who takes a hands-on approach to work in the space and provides a partner-led service on behalf of clients, from securing acquisition of the land, advice on zoning/environmental issues, lease negotiations and divestment of the property.

Luxembourg > Commercial, corporate and M&A

DSM Avocats à la Cour has ‘deep knowledge of Luxembourg law and displays a pragmatic and highly responsive approach’ on behalf of corporates and funds  across a range corporate and commercial matters, including on M&A and joint venture structuring. Headed by the ‘very hands-on’ Mario Di Stefano and the ‘very responsive’ Renaud Le Squeren  much of the work relates to real estate matters.

Luxembourg > Dispute resolution

At DSM Avocats à la Cour, team head Mario Di Stefano provides ‘responsive, very hands-on and detail oriented’ advice to clients across a range of commercial disputes, including in the context of contentious real estate and construction matters.