After law school, Shanmugam was a
law clerk for judge
J. Michael Luttig of the
U.S. Court of Appeals for the Fourth Circuit from 1998 to 1999, In 2019, Shanmugam moved to the law firm of Paul, Weiss, Rifkind, Wharton & Garrison to become the managing partner of the firm's
Washington, D.C. office, and chair of its newly established Supreme Court and appellate practice. Shanmugam has argued 39 cases before the Supreme Court. Most notably, in 2020, he argued on behalf of Seila Law in the landmark case
Seila Law LLC v. Consumer Financial Protection Bureau, which held that the structure of the
Consumer Financial Protection Bureau was unconstitutional. He also argued on behalf of the victims of the
USS Cole bombing in
Republic of Sudan v. Harrison. On May 29, 2025, Harvard University announced that Shanmugam had been elected to the
Harvard Corporation. == See also ==