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Cyril Brennan, Shareholder
Greenberg Traurig, LLP

Cyril (Cy) Brennan focuses his practice on international trade and national security regulatory and compliance matters, with an emphasis on U.S. export controls, economic sanctions, and foreign direct investment matters. Cy provides clients experience across a broad array of U.S. international trade regulatory frameworks, including the International Traffic in Arms Regulations (ITAR), the Export Administration Regulations (EAR), the various U.S. sanctions programs administered by the Treasury Department’s Office of Foreign Assets Control (OFAC) and the Department of Commerce’s anti-boycott regulations. His clients include a wide of array of companies in the aerospace, defense, space and hi-tech sectors.

Cy also assists clients in complex matters involving the national security regulatory space. He focuses on representing clients before the Committee on Foreign Investment in the United States (CFIUS) in the context of mergers and acquisitions, as well as private equity, real estate, and venture capital investments. In this capacity he also advises on the National Industrial Security Program, including negotiating foreign ownership, control, or influence (FOCI) mitigation instruments with the Defense Counterintelligence and Security Agency (DCSA).

Prior to joining Greenberg Traurig, Cy served in the United States Senate in a foreign relations capacity, and later worked in-house at one of the world’s largest aerospace and defense companies.


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