Brian P. Donnelly

Brian Donnelly is an experienced litigator who represents companies in a variety of areas, including antitrust, administrative litigation, and complex business disputes. He is active in the firm’s Antitrust, Regulatory and Unfair Trade Practices group and co-chairs the DC office’s Recruiting and Pro Bono committees. A former Marine Corps officer and Iraq War veteran, Brian regularly provides pro bono representation to military veterans and veteran-serving organizations.

What do you focus on?

I help clients manage litigation in service of their broader business goals. I have represented clients in numerous state and federal lawsuits, including several trials. I also handle administrative investigations and provide counseling as part of antitrust and regulatory compliance programs.


I help clients comply with state and federal antitrust laws and defend them in related investigations and litigation. I have represented clients in significant public-company mergers, including Hart-Scott-Rodino filings and extensive second requests. I also provide regular compliance counseling to companies and trade organizations.

Administrative Litigation

I help clients navigate administrative investigations and litigation against state and federal governments. I defend owners and managers of affordable housing projects before HUD and other agencies, as well as in state and federal investigations. I also have extensive experience in the United States Court of Federal Claims helping companies recover energy grant payments from the Department of the Treasury under Section 1603 of the American Recovery and Reinvestment Act of 2009.

Complex Business Disputes

I handle a wide variety of business disputes, including claims for business torts, trade secret violations, breach of fiduciary duties, and breach of contract, among other areas.

What do you see on the horizon?

Antitrust regulators will continue to grapple with the growing prevalence of big data and its effects on competition. Companies must remain attentive to developments in this area as data becomes ever more integral to their businesses. I also see the increased politicization of federal agencies raising the need for companies to seek creative solutions to administrative disputes.

Prior Experience

Prior to law school, Brian served as a public affairs officer in the U.S. Marine Corps and deployed to Iraq in 2006.

FTC steps up actions against VoIP providers to abet scammers

Rochester Business Journal | January 17, 2020

In his latest monthly column, Rochester Corporate partner Jeremy Wolk analyzes a recent action by the Federal Trade Commission to crack down on VoIP providers who turn a blind eye to their clients’ unlawful telemarketing practices. Washington, DC, Complex Commercial Disputes associate Brian Donnelly and Rochester Complex Commercial Disputes associate Zach Osinski contributed to the article.

Facebook lawsuit underscores importance of transparent collection and use of data

Rochester Business Journal | January 25, 2019

Rochester Corporate partner Jeremy Wolk wrote this contributed column analyzing a lawsuit filed against Facebook in Washington, DC, alleging violations of state-level consumer protection laws by the social media company. This article incorporates perspective from an alert written by Washington Complex Commercial Disputes associate Brian Donnelly, Rochester Corporate associate Jenny Holmes, and Los Angeles Government Investigations & White Collar Defense associate Karina Puttieva.


Brian P. Donnelly


Washington, DC

Phone: 202-585-8191

Fax: 866-556-0934

Columbia Law School, J.D.

University of Oklahoma, M.A.

Cornell University, B.A.


District of Columbia

U.S. Court of Federal Claims

U.S. District Court, Eastern District of Virginia

U.S. District Court, District of Maryland

U.S. District Court, District of the District of Columbia

U.S. Court of Appeals, Federal Circuit

  • District of Columbia and American bar associations
  • The Barristers
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