Antitrust Attorney Esther Pyon Joins Brownstein as Shareholder

Brownstein Hyatt Farber Schreck is pleased to announce Esther Pyon has joined the Corporate Department in the firm’s Washington, D.C., office as a shareholder. She will focus on antitrust and Hart-Scott-Rodino Act compliance.

“With over a decade of experience in antitrust law across both government and private practice, Esther has worked on some of the most complex merger reviews and regulatory reforms in recent years,” said Brownstein’s Corporate Department Chair Elizabeth Paulsen. “Her experience shaping national merger policy at the Department of Justice (DOJ) and advising clients across industries on compliance and competition strategy makes her a great addition to our corporate team.”

Pyon has significant experience navigating complex antitrust issues. She represents clients before the DOJ and Federal Trade Commission (FTC) in merger reviews and antitrust investigations involving novel legal issues, securing regulatory approvals for complex transactions. She advises companies across sectors—including tech, health care, telecom and private equity—on antitrust and HSR compliance, merger control and legislative developments. As an attorney advisor at the U.S. Department of Justice Antitrust Division, Pyon worked on merger policy, interagency enforcement and regulatory reform. She played a key role in developing the 2023 Merger Guidelines and the 2024 Premerger Notification Rule and Regulations. She also represented DOJ in cross-government working groups on artificial intelligence, telecommunications and internet policy, and regularly trained attorneys and economists across federal agencies on these issues.

Pyon received her bachelor’s degree from the University of Michigan and a master’s degree and juris doctorate degree from American University’s Washington College of Law.