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H. Deen Kaplan

Washington, D.C.

H. Deen Kaplan

A leading international trade and cybersecurity practitioner, Deen Kaplan is widely recognized for his ability to guide clients through complex multinational legal and technical challenges. Deen represents businesses and governments in some of their most demanding international trade and investment disputes, cybersecurity matters, and cyber policy-related matters. He also serves as a global director of the firm's International Trade and Investment Practice and co-head of Hogan Lovells Cyber Risk Services.

In his trade practice, Deen has guided clients in dispute settlement proceedings before the World Trade Organization (WTO), North American Free Trade Agreement and London Court of International Arbitration panels, U.S. and Chinese government-led investigations and appeals, and trade-related bilateral and multilateral negotiations. Deen's trade-focused areas of concentration include security and trade, government-related disputes, subsidy law policy, WTO 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 regularly manages overall 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 co-chair of Hogan Lovells Technology Committee and is a member of the global Core Technology Group that helps manage the firm's technology policies and resources across more than 45 offices.

"Unbelievably smart ... 'blow[s] clients away."'

Chambers USA

Representative experience

Represent the government of Ontario in the world's largest countervailing duty dispute, including U.S., NAFTA, LCIA, and WTO proceedings and appeals.

Represent a major retailer in responding to the cyber-theft of customer data, including extensive technical work with incident response professionals.

Represent Emirates Airline in countering a protectionist attack by a coalition of U.S. airline groups led by Delta, American, and United Airlines.

Represent companies, associations, and governments in review, assessment, and strengthening of their cyber risk policies and incident response plans.

Represented the Ford Motor Company in the Russian antidumping investigation of light commercial vehicles from Turkey, Germany, Italy, and Poland.

Represent major global technical services provider in a U.S. government investigation of sophisticated cyber-attacks against the company's IT systems.

Represented the U.S. Grains Council and DDGS industry in the Chinese antidumping investigation of U.S. DDGS.

Represent multinational corporations in effectively identifying, addressing, and mitigating the risks associated with sophisticated cyber-attacks.

Education and admissions


  • J.D., magna cum laude, Order of the Coif, Georgetown University Law Center, 1997
  • M.Div., cum laude, Gordon Conwell Seminary, 1986
  • B.A., magna cum laude, Duke University, 1982

Bar admissions and qualifications

  • District of Columbia
  • Virginia

Court admissions

  • Court of International Trade
  • District of Columbia Court of Appeals
  • Supreme Court of Virginia
  • U.S. Court of Appeals, District of Columbia Circuit
  • U.S. Court of Appeals, Federal Circuit


International Trade: Trade Remedies & Trade Policy (Nationwide)

Chambers USA

2007, 2011-2017

Dispute Resolution: International Trade

Legal 500 US


International Trade: Trade Remedies & Trade Policy (USA)

Chambers Global


Trade and Customs

Who's Who Legal: The International Who's Who of Business Lawyers


International Trade and Finance Law

The Best Lawyers in America


Guide to the World's Leading International Trade Lawyers

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