H. Deen Kaplan

In his trade practice, Deen has guided clients in dispute settlement proceedings before the World Trade Organization (WTO), U.S.-Mexico-Canada Trade Agreement (USMCA) and London Court of International Arbitration panels, U.S., South American and Chinese government-led investigations and appeals, and trade-related bilateral and multilateral negotiations. Deen's trade-focused areas of concentration include government-related negotiations and disputes, security and trade, subsidy law policy, USMCA matters, and countervailing and antidumping duty litigation.

In his cybersecurity practice, Deen has helped clients navigate some of the world's prominent security incidents, breaches, and security-related matters. Deen manages incident responses, threat detection and mitigation strategies, cyber-risk legal assessments and planning, notification obligations, and long-term secure data strategies involving multiple countries and continents. Deen has worked closely with corporate general counsel, dedicated internal and external IT staff, outside security consultants, and law enforcement authorities in North America, Europe, and Asia.

Chambers USA lauds Deen as "unbelievably smart," noting his role in one of the world's largest disputes and his capacity to "blow clients away" with his work.

Deen serves as a member of the firm’s Global Information Risk Committee, and has helped manage the firm's technology policies and resources across more than 40 offices for several years.