Léon Korsten advises on and litigates in cases involving EU and national competition law, state aid, market regulation (enforcement and supervision), public procurement and civil-law enforcement. He also advises on and assists in investigations and raids conducted by the regulatory authorities and he regularly conducts internal investigations for his clients. Léon also assists clients in drafting and implementing compliance programmes.

He has handled many European and Dutch competition law cases, including the Dutch civil proceedings which led to the famous 1999 Eco Swiss/Benetton judgment of the European Court of Justice.

Léon is Global Co-Chair of DLA Piper's Antitrust & Competition Group.