Mario Mancuso, P.C. - Partner

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Mario Mancuso, P.C.

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Washington, D.C.
Phone: +1 202-879-5070
Fax: +1 202-879-5200
New York
Phone: +1 212-446-4670
Fax: +1 212-446-4900
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Professional Profile

Mario Mancuso, P.C. leads the Firm’s International Trade and National Security practice. A former member of the President’s national security team, Mario works closely with private equity sponsors, management teams, and corporate boards to identify and mitigate cross-border transactional and other risks. With his extensive senior U.S. government, M&A, and international experience, he brings a unique perspective to sophisticated clients doing business across international borders.

Since his return to private practice, Mario has been consistently recognized by Chambers Global: The World’s Leading Lawyers for Business and Chambers USA: America’s Leading Lawyers for Business as a leading international practitioner. He is a highly regarded advisor on international risk matters involving the Committee on Foreign Investment (CFIUS), economic sanctions (OFAC), export controls (ITAR, EAR), and the Foreign Corrupt Practices Act (FCPA). Clients appreciate his "very strategic" approach, and consistently applaud his work as "a highly skilled technician of the law and commercially savvy advisor."

During his tenure as Under Secretary of Commerce for Industry and Security, Mario was the lead U.S. official with immediate policy responsibility for matters involving U.S. industry and national security. In particular, he served as a senior CFIUS decision-maker, helped draft and implement regulations for the Foreign Investment and National Security Act of 2007 (FINSA) and reviewed hundreds of CFIUS transactions as a regulator. As Under Secretary, he also participated in National Security Council decisions regarding economic sanctions (OFAC) programs; led the bilateral strategic technology dialogues for the United States, including the U.S.-China High Technology and Strategic Trade Working Group, the U.S.-India High Technology Cooperation Group, and the U.S.-Israel High Technology Forum; and led and managed an agency of approximately 400 career civil servants in offices throughout the United States and in China, India, Hong Kong, the UAE and Russia.

During his tenure as Deputy Assistant Secretary of Defense (DASD) for Special Operations and Combating Terrorism, Mario was the lead civilian U.S. defense official with immediate responsibility for the global special operations and counter-terrorism portfolio. As DASD, Mario led and managed an office which included approximately 40 national security strategists; provided oversight of a $10 billion budget (excluding classified budget) and 53,000 special operations personnel worldwide; and sat on the Department of Defense Advisory Board for the Asia-Pacific Center for Security Studies, the Near East-South Asia Center for Strategic Studies, the George C. Marshall European Center for Strategic Studies, and the Center for Hemispheric Defense Studies.

Mario’s extensive senior government experience includes:

  • U.S. Under Secretary of Commerce, Industry and Security (confirmed unanimously by the U.S. Senate)
  • Deputy Assistant Secretary of Defense, Special Operations and Combating Terrorism
  • Special Counsel, Office of the U.S. Secretary of Defense
  • Board Member, Global Markets Board, U.S. National Intelligence Council
  • Board Member, CFIUS Advisory Board, U.S. National Intelligence Council
  • U.S. Chair, U.S.-China High Technology and Strategic Trade Working Group
  • U.S. Chair, U.S.-India High Technology Cooperation Group
  • U.S. Chair, U.S.-Israel High Technology Forum

With his extensive senior government, enforcement and international experience, he is particularly well-positioned to help clients through crises that involve national security-related regulatory enforcement actions or government investigations by the Office of Foreign Assets Control (OFAC), the Directorate of Defense Trade Controls (DDTC), the Bureau of Industry and Security (BIS), the Financial Crimes Enforcement Network (FinCEN), the Department of Justice (DOJ) and/or the Securities and Exchange Commission (SEC).

Mario has authored many articles and regularly contributes to leading U.S. and international media outlets on the subjects of U.S. national security, international affairs and global business. Prior to his presidential service, he was in private law practice and served as a forward deployed military officer during combat operations.

Mario released the 2017 edition of his book, A Dealmaker’s Guide to CFIUS, on November 7, 2017 which aims to help buyers, sellers, and other interested parties think through CFIUS—strategically and tactically—within the M&A process. Request a complimentary PDF copy of the book here.


Memberships & Affiliations

Lecturer and Senior Fellow, Yale University, Jackson Institute for Global Affairs

Life Member, Council on Foreign Relations

Advisory Board, New York University Law School, Center on Law and National Security

Member, Atlantic Council

Visiting Senior Fellow for International Security, Hudson Institute


Other Distinctions

Mario is consistently recognized by Chambers Global: The World’s Leading Lawyers for Business and Chambers USA: America’s Leading Lawyers for Business

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