Mark Nadeau is a trial lawyer involved in complex commercial cases throughout the United States and has represented clients in many high-profile disputes.

Amongst these are significant industry focused work involving television, aviation, real estate hospitality, energy, trade secret and unfair business practice matters. His work in the energy sector has involved disputes concerning off-shore platform construction and insurance issues, nuclear plant and rod exchange programs, pipeline line siting and failures, drilling and extraction issues, as well as take or pay litigation. He has served as lead counsel in high-profile satellite television multibillion-dollar disputes involving retransmission and antitrust issues. On behalf of several aviation and launch-system clients, he has worked on issues involving rocket technology, joint venture disputes, cockpit avionics, license and patent claims, airworthiness, airframe and engine performance financing. With an extensive background in all types of real estate disputes, Mark has acted as lead counsel on several multi-party construction and hospitality cases involving the acquisition, development, financing and operation, and management of hotels, resorts, spas and golf courses. He has defended many class action suits.

Beyond a very active litigation practice in the United States, his international arbitration practice spans Europe, Asia and South America. Mark is widely recognized as a leading commentator and has chaired numerous symposia on international dispute resolution.

At DLA Piper, Mark is the founding partner of the Phoenix office, where he now acts as the co-managing partner and chair of the office's litigation department. He is also a nationally elected member of DLA Piper’s Policy Committee.