A&O Shearman Adds CFIUS Expert Catherine Hein in Washington DC

Hein joins the firm's international trade group after senior roles at the U.S. Treasury Department.

Published on Feb. 23, 2026

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Catherine Hein has joined A&O Shearman as a partner in its international trade group in Washington, D.C., the firm announced on Monday. Hein, who previously held senior positions at the U.S. Department of the Treasury, including serving as CFIUS managing counsel, will manage CFIUS reviews for private equity firms, sovereign wealth funds, and corporate clients.

Why it matters

Hein's expertise in CFIUS, the Committee on Foreign Investment in the United States, will be valuable for A&O Shearman's clients as the U.S. government continues to scrutinize foreign investments for national security concerns.

The details

At the Treasury Department, Hein led a team of more than 20 lawyers handling CFIUS reviews and also served as acting principal deputy assistant general counsel for Enforcement & Intelligence. She joins A&O Shearman from Latham & Watkins.

  • Hein joined A&O Shearman as a partner on Monday, February 23, 2026.

The players

Catherine Hein

A partner in the international trade group at A&O Shearman in Washington, D.C. who previously held senior positions at the U.S. Department of the Treasury, including serving as CFIUS managing counsel.

A&O Shearman

An international law firm that has added Catherine Hein as a partner in its Washington, D.C. office.

U.S. Department of the Treasury

The government agency where Catherine Hein previously held senior roles, including serving as CFIUS managing counsel and acting principal deputy assistant general counsel for Enforcement & Intelligence.

Latham & Watkins

The law firm that Catherine Hein is joining A&O Shearman from.

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The takeaway

Catherine Hein's addition to A&O Shearman's international trade group in Washington, D.C. strengthens the firm's expertise in CFIUS reviews, which is an increasingly important area of focus for companies navigating foreign investment regulations and national security concerns.