Mark Hamer

Baker & McKenzie LLP

Mark Hamer is Chair of the Firm’s North America Antitrust & Competition Practice Group. Mark has over 25 years of wide-ranging litigation experience, including first-chair roles in jury trials, bench trials and arbitrations. His primary focus is antitrust litigation.

Before joining Baker McKenzie, Mark was a successful federal prosecutor in the Antitrust Division of the US Department of Justice. He was involved in some of the DOJ’s highest-profile antitrust trials. Before joining the DOJ, Mark was a partner at another global law firm where he handled complex multidistrict antitrust class actions in courts across the nation.

Mark’s practice focuses on antitrust litigation, both private and public. He assists clients in the defense of merger challenges, class actions, and civil and criminal investigations. He helps clients navigate federal and state regulatory inquiries, enforcement actions, complex merger clearance matters and multidistrict antitrust class actions.

As an experienced antitrust counsel, Mark also regularly provides antitrust advice on a broad range of non-litigation matters, including antitrust deal support, merger clearance strategy, sales and distribution advice, and antitrust compliance.

Mark is seasoned in a diverse array of industries, including payments, financial services, energy, rail and truck systems, computer hardware and software, consumer products, movie theaters, satellite broadcasting and insurance.


  • University of Virginia School of Law (J.D.) (1991)
  • University of Virginia (B.A. with High Distinction) (1988)


  • District of Columbia~United States (2017)
  • California~United States (1991)

Representative Legal Matters:

  • Lead counsel for German railway component manufacturer in In re Railway Industry Employee No-Poach Antitrust Litigation (MDL 2850) in the Western District of Pennsylvania.
  • Lead counsel for medical device manufacturer in antitrust litigation alleging monopolization in the Western District of Texas.
  • Served as DOJ trial counsel in a two-month antitrust trial concerning credit card anti-steering rules, affecting over USD 50 billion in commerce.
  • Served as DOJ trial counsel in the challenge to a multinational manufacturer’s USD 3 billion acquisition in the home appliances industry.
  • Served as DOJ trial counsel in the enforcement action to enjoin the merger of the nation’s top two cinema advertising networks.


Rate : $$$

What types of cases Attorney Mark Hamer & Baker & McKenzie LLP can handle?
Baker & McKenzie LLP can handle cases related to laws concerning Financial Services, Litigation, White Collar Crime, Mergers & Acquisitions, Antitrust & Trade, Transportation. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
Where is Baker & McKenzie LLP located?
Baker & McKenzie LLP is located at 815 Connecticut Ave NW, Washington, DC 20006, USA. You can reach out to Baker & McKenzie LLP using their phone line 202.452.7077. You can also check their website
How much would it cost to hire Baker & McKenzie LLP?
Mark Hamer lawyer charges are specific to each case. However, they work with contingency fees and its ranges from $$ to $$$. They also provide free consultation [and no obligation quotes] if you are interested to hire.
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