Adrian Steel is senior counsel in the Washington office of Mayer Brown’s Litigation & Dispute Resolution and Antitrust & Competition practices. He focuses on assisting clients secure approval of mergers, share acquisitions, asset sales, and other control transactions from foreign competition authorities, and he assists several major international corporations in globally coordinating their merger control filings. He concentrates on identifying new developments in filing requirements and in assisting clients in efficiently and effectively obtaining timely approvals.

In administrative and regulatory matters, Adrian represents corporations before federal and state administrative agencies in rulemaking and adjudicatory proceedings, including representation of major Class I rail carriers in proceedings before the Surface Transportation Board.

In the area of dispute resolution, Adrian represents corporate clients in securities fraud, products liability, breach of contract, and other business litigation matters. He manages complex multistate litigation involving the coordination of pending cases and discovery. He also has experience with, and has served as a party-appointed arbitrator, in major commercial disputes.

A member of Mayer Brown’s Washington, DC office since 1981, Adrian served as co-Chair of the firm's Pro Bono Committee from 2005 to 2011. Following law school graduation, he was Law Clerk to The Honorable William H. Webster, US Court of Appeals for the Eighth Circuit, and from 1978 to 1981 was Special Assistant to Judge Webster when the Judge served as Director, Federal Bureau of Investigation. Between those assignments, Adrian practiced with a St. Louis law firm.

Spoken Languages

  • English


University of Missouri-Columbia, BA, with honors
Phi Beta Kappa

The University of Michigan Law School, JD, magna cum laude
Associate Editor, Law Review; Order of the Coif


  • District of Columbia
  • Illinois
  • Missouri


  • Member, Fairfax County VA Ad Hoc Police Practices Review Commission, 2015 to date
  • Member, District of Columbia Court of Appeals Committee on Admissions, 2014 to date
  • Commissioner, The William H.Webster Commission on the Federal Bureau of Investigation, Counterterrorism Intelligence, and the Events at Fort Hood, Texas, on November 5, 2009, 2010-2013
  • Ronald McDonald House, Board, 1990 to 2012; President, 1995-1998
  • Legal Counsel for the Elderly, Board, 1984 to date; Chairman, 1989 and 2007-2008
  • DC Bar Pro Bono Lawyer of the Year, 1988
  • District of Columbia Bar Association
  • Illinois State Bar Association
  • Missouri Bar Association