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Professionals

In more than 100 years of practice, Steptoe has earned an international reputation for vigorous representation of clients before governmental agencies, successful advocacy in litigation and arbitration, and innovative and practical advice in structuring business transactions.

Lee Berger
Lee Berger focuses on antitrust law, including civil enforcement, private litigation, criminal investigations, compliance advice, and mergers. Lee has experience working on cases focused on industries…

Partner

Antitrust Investigations & Litigation, Antitrust Mergers, Acquisitions, & Joint Ventures, Antitrust/Competition, ESG, Climate & Sustainability

Boyd Cloern
Boyd Cloern is a first chair trial lawyer who focuses on intellectual property matters. Boyd's most recent trial experience includes trade secret, copyright, and patent claims, both in federal…

Partner

Patent, Copyright, Trade Secrets, Antitrust/Competition

Derek F. Foran
Derek Foran represents public and private companies in complex civil litigation in state and federal courts. Considered a litigation "heavy weight," his practice focuses on high stakes trials and…

Partner

Commercial Trials & Litigation, Independent & Internal Investigations, White-Collar Defense, Antitrust Investigations & Litigation

Donna Faye Imadi
Donna Faye assists clients with antitrust counseling and litigation, mergers, and international trade matters. Her practice also includes counseling on environmental, social, and governance (ESG)…

Associate

Antitrust Investigations & Litigation, Antitrust Mergers, Acquisitions, & Joint Ventures, Antitrust/Competition, ESG, Climate & Sustainability

Jonathan D. Janow
Jon is an experienced litigator in complex civil litigation spanning commercial, antitrust, administrative, consumer protection, trade secrets, products liability, class actions and appeals. He has…

Partner

Commercial Trials & Litigation, Antitrust/Competition, Antitrust Investigations & Litigation, Life Sciences

Weisiyu Jiang
Weisiyu Jiang is a seasoned antitrust lawyer whose practice spans mergers and acquisitions, government investigations, private litigation, civil enforcement, and compliance counseling. Weisiyu has…

Associate

Antitrust/Competition, Antitrust Investigations & Litigation, Antitrust Mergers, Acquisitions, & Joint Ventures, Internet, Telecom & Media

John J. Kavanagh
John Kavanagh focuses on complex litigation including antitrust law, government investigations, and complex commercial litigation. On the antitrust side, John has handled numerous civil litigation…

Partner

Antitrust/Competition, Cartels & Conspiracies, Securities Enforcement, White-Collar Defense

Robert Klotz
Robert advises and represents a wide range of clients in the field of EU and German antitrust and competition law. With his extensive background as an official in DG Competition of the European…

Partner

Antitrust/Competition, Antitrust Investigations & Litigation, Antitrust Mergers, Acquisitions, & Joint Ventures, EU and UK Competition

Leigh Mallon
Leigh Mallon represents leading corporate clients and institutions in high-value, complex commercial litigation and international arbitration matters, as well as in a broad range of regulatory matters…

Partner, Steptoe International (UK) LLP

Commercial Trials & Litigation, International Arbitration, Judgment Enforcement & Asset Recovery, Antitrust Investigations & Litigation

Domniki Mari
Domniki advises clients on EU and UK Competition and Regulatory Law matters. In particular, Domniki works on antitrust cases (enforcement practice and litigation before the Court of Justice of the…

Associate

Antitrust/Competition, Antitrust Investigations & Litigation, EU and UK Competition, Antitrust Mergers, Acquisitions, & Joint Ventures

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Press Releases International Arbitration Attorney Robert Reyes Landicho Joins Steptoe’s International Disputes Practice in Houston March 30, 2026 Press Releases Steptoe Recognized With Two Honors in GCR Awards 2026 March 27, 2026 Webinars AI, Data & Digital Roundtable on the Insurance of AI Risk April 8, 2026
Press Releases Veteran Financial Regulatory Litigator Trace Schmeltz Joins Steptoe's Investigations, White-Collar Defense & Compliance Group March 23, 2026 Press Releases Chambers Europe 2026 Recognizes Steptoe Practices and Lawyers March 19, 2026 Press Releases Steptoe Recognized for Exceptional Cross‑Border Litigation Work in China Business Law Journal’s Deals of the Year 2025 March 13, 2026 Global Trade & Investment Law Blog US Supreme Court Strikes Down IEEPA Tariffs February 20, 2026 Press Releases Steptoe Earns "Highly Recommended" Recognition in World IP Review's USA Patent Rankings 2025 February 18, 2026 Press Releases Steptoe Attorneys Michael Allan and Joseph Ecker Recognized in 2026 WTR 1000 February 18, 2026 Press Releases Steptoe Expands Energy Regulatory and Pipeline Reach with Amy Hoff Joining as Houston Partner February 13, 2026 Press Releases Steptoe Highly Ranked in Chambers Global 2026 February 13, 2026 Press Releases Steptoe Expands Trade Remedies Group With Addition of Partner Ron Kendler February 2, 2026

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