Dr. Marcel Meinhardt is a leading expert in competition law and is renowned for his broad, first-rate practice. He specialises in all areas of Swiss and European merger control work and competition law, particularly in the postal services, insurance, banking, motor-car, energy, media, retail, construction, pharma, ticketing and IT. Marcel Meinhardt also advises on regulatory issues in connection with the electricity and gas industry. He has been responsible for a large number of merger notifications to the Swiss Competition Commission and co-ordinated multi-jurisdictional merger filings. Marcel Meinhardt advises in contentious and non-contentious matters and has acted in high profile cases on alleged abuses of dominant positions, vertical restraints and cartels. He heads the competition and regulated practice group of Lenz & Staehelin.

Chambers and Partners 2016 recognized Marcel Meinhardt as a leading lawyer in the field of Competition/Antitrust and is commended as "outstanding in terms of what he does, what he writes and how he handles searches." He is "very fast thinking and great at communicating with clients - he explains things in a fantastic way" (2015 edition). Legal 500 (2013 edition) describes him as "one of the best specialists in competition law in Switzerland" due to his "great analytical skills, pragmatism and excellent contacts". Who’s Who Legal 2016 qualifies Marcel Meinhardt as "absolutely brilliant" and as "a counsel you desperately want to have, especially on hard-core abuse of dominance, cartel and other horizontal agreements".