Aimen Mir and Colin Costello

speaker Aimen Mir and Colin Costello

[Under the Biden administration,] where you’re most likely to see fairly significant change is in process. … It’ll go back to that black box model.

Aimen Mir

Aimen is a partner at Freshfields in the Washington-based antitrust, competition and trade practice and global sanctions and trade practice. He joined the firm after serving in several leadership roles in CFIUS and the US Department of the Treasury. Most recently, he spent four years as deputy assistant secretary for investment security at the US Department of the Treasury, serving as the senior-most career CFIUS official and implementing Treasury’s role as the chair of CFIUS. Aimen played a leading role in shaping and negotiating the Foreign Investment Risk Review Modernization Act of 2018 (FIRRMA), the most significant expansion of CFIUS’s powers in 30 years. He also shaped key elements of the emerging and foundational technologies provisions of the Export Control Reform Act of 2018. Aimen also previously served as counsel in the national security division of the US Department of Justice. Aimen started his career in the Washington, DC office of another law firm where he advised and represented companies in regulatory compliance, investigations, and enforcement matters under export control, economic sanctions, trade remedy, and other laws regulating international business transactions.


Colin Costello

Colin is a CFIUS client advisor at Freshfields, in the national security practice, based in Washington, DC. Colin has been at the forefront of U.S. government deliberations over threats associated with foreign investment for nearly a decade. Prior to joining Freshfields, Colin served as the Acting Director of the National Intelligence Council, Investment Security Group within the Office of Director of National Intelligence. Colin led the Intelligence Community’s analytic support to CFIUS and served as the Intelligence Community’s primary representative to CFIUS, participating in every CFIUS review since March 2013.  He also led the Intelligence Community’s support for the Committee for the Assessment of Foreign Participation in the U.S. Telecommunications Services Sector (known as Team Telecom) and other foreign investment regulatory processes.