Lesage is a member of the Luxembourg Bar, the American Bar Association, the International Bar Association and the International Fiscal Association, where he was appointed as national co-reporter for the 2003 and 2005 Congresses. He is a former member of the fiscal commission of the Luxembourg Bankers’ Association.

Prior to joining Arendt & Medernach, Lesage worked as a tax manager with one of the Big Four firms and as head of the corporate tax department with a bank in Luxembourg.

He holds a Master’s degree in law from the Université de Liège in Belgium, as well as a Master’s degree in fiscal law from the Université Libre de Bruxelles in Belgium.

He is the co-author of the Luxembourg chapter of the International Guide to the Taxation of Holding Companies published by the IBFD in Amsterdam.

Lesage is recommended as a tax lawyer in the major league tables, including Best Lawyers, Legal 500 and Chambers Europe.

He speaks English, French, Dutch and Italian and has reading knowledge of German.