Mark Cave is a seasoned securities enforcement lawyer (not yet admitted in Washington, DC*) who draws on more than a decade of experience at the US Securities and Exchange Commission (SEC) to advise clients on complex government investigations, enforcement actions, and regulatory matters.

Before joining O’Melveny, Mark spent more than 15 years at the SEC, where he most recently served as Chief Counsel for the Division of Enforcement. Mark joined the SEC in 2010 and went on to hold a series of senior leadership positions, including as an Associate Director and Assistant Director. During his tenure, Mark led teams of attorneys and accountants in hundreds of investigations and related litigation involving complex accounting and disclosure violations by public and private companies, misconduct by auditors, investment adviser and broker-dealer misconduct, insider trading, offering frauds and Ponzi schemes, FCPA violations, misconduct related to special purpose acquisition companies (SPACs), and digital asset securities. In addition to his role as Chief Counsel, Mark also led the SEC’s Cross-Border Task Force at its inception in 2025.

Mark’s extensive government experience gives him a deep understanding of the SEC’s investigative and enforcement processes, including how matters are evaluated, investigated, and resolved. Mark brings that perspective to clients navigating SEC scrutiny, internal investigations, and other high-stakes regulatory and enforcement matters.

Before joining the SEC in 2010, Mark was a litigation associate at a leading global law firm, where he represented financial institutions and corporations in complex commercial litigation, regulatory matters, commercial arbitration, and internal investigations, with a particular focus on securities litigation and regulatory defense.