Michael McMahon

Practice Areas

Michael has extensive experience, both at Cooley and as a former Department of Justice (DOJ) trial attorney, leading complex, multijurisdictional commercial matters, post-acquisition disputes and internal investigations. He has represented purchasers, sellers and underwriters in nearly 100 post-acquisition disputes, and he regularly provides pre-deal counseling on litigation matters in M&A transactions. Michael has served as lead trial counsel on behalf of plaintiffs and defendants in matters involving claims of fraud, trade secret misappropriation, misuse of confidential information and breach of contract, among others. He also represents companies and individuals facing investigations from federal and state government entities – such as the DOJ, the Securities and Exchange Commission (SEC) and state attorneys general offices.

Before joining Cooley, Michael served as a trial attorney in the Commercial Litigation Branch of the DOJ’s Civil Division, which he joined through the Attorney General’s Honors Program. At the DOJ, Michael led dozens of investigations of home health agencies, skilled nursing facilities, assisted living facilities and other federal government contractors, and he recovered millions of dollars for the US government under the False Claims Act (FCA), Anti-Kickback Statute and Anti-Kickback Act.