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Brian L. Duffy

Brian L. Duffy assumed the role of Chief Executive Officer at Greenberg Traurig, LLP in January 2016. Previously Brian served as a firm President as well as chair of the firm’s 600-member Global Litigation Department from 2009 to 2013. A true “working CEO,” Brian focuses his practice on trial and appellate work in the class action, employment, energy, commercial contract, and product liability areas, serving as national, regional, and local counsel in high-profile cases throughout the US.

Under Brian’s leadership, Greenberg Traurig received important rankings reflective of his and the firm’s commitment to a diverse and quality workplace. Brian is involved with the leadership and direction of the firm’s diversity efforts, including the independently recognized Greenberg Traurig Women’s Initiative and its Affinity Groups, addressing the needs of minority and diverse attorneys throughout the firm. The firm’s work includes forging important relationships with key organizations. As one example of many, Brian serves on the Out Leadership Global Advisory Board.

Since Brian began his tenure as CEO, Greenberg Traurig has received a distinguished set of awards and accolades in the pro bono arena, one of his key areas of focus including the Distinguished Service to the Arts Award from Lawyers for the Creative Arts; the Common Good (Pro Bono) Award from Big Brothers Big Sisters of America; the Hope Award from The Center of Hope (Haiti); the Champion of Justice Award from the Domestic Violence Legal Clinic; and was honored at the Equal Justice Works 30th Anniversary.

During Brian’s time at Greenberg Traurig, the firm has assisted hundreds of charitable organizations through its Philanthropic Foundation, resulting in real-life positive impact on communities throughout the United States where the firm has offices and clients. Additionally, the Greenberg Traurig Fellowship Foundation continues to provide funding for lawyers and law students to work with public interest groups. The Foundation became the largest sponsor of Equal Justice Works Fellowships in the United States.

Brian holds a J.D. from the University of Colorado Law School, where he was honored as Outstanding Alumni in private practice. He received a B.S., summa cum laude, from the University of South Dakota.


  • Class action defense
  • Wage and hour claims
  • Breach of contract claims
  • Whistleblower defense
  • Global energy and infrastructure



  • Acted as lead defense counsel in multi-district litigation proceeding involving 35 putative wage and hour class actions.
  • Acted as national coordinating counsel for Fortune 50 company in defense of approximately 70 wage and hour class actions.
  • Acted as lead defense counsel in multi-district litigation proceeding involving approximately 50 putative consumer class actions arising out of the sale of motor fuel.
  • Defended over 200 class actions covering nearly every type of consumer and business issue.
  • Represented company in proceedings related to alleged violations of immigration laws, including governmental and internal investigations, related civil litigation and compliance programs.
  • Represented companies alleged to have violated the Foreign Corrupt Practices Act (FCPA), including design and implementation of compliance programs, and related internal investigations.
  • Represented major energy company in three-week breach of contract trial involving a defective piece of mining equipment, which resulted in judgment of $30 million in favor of our client.
  • Represented major pipeline company in seven-week jury trial arising out of a pipeline rupture and explosion, which resulted in the deaths of 12 people. The jury returned a defense verdict on all claims.

Recognition & Leadership

  • Listed, The Best Lawyers in America, Commercial Litigation; Litigation - Labor and Employment, 2010-2021
  • Listed, Chambers USA Guide, 2013-2020
  • Listed, Super Lawyers magazine, Colorado Super Lawyers, 2006-2018 and 2020
  • Listed, Acritas Stars™ Independently Rated Lawyers, “Star Lawyers,” 2018-2021
  • Team Member, U.S. News - Best Lawyers®, Best Law Firms Edition, "Law Firm of the Year," Environmental Law, 2016
  • Recipient, "Alumni Award for Distinguished Achievement in Private Practice," University of Colorado Law School, 2015
  • Rated, AV Preeminent® 5.0 out of 5.0

°AV®, AV Preeminent®, Martindale-Hubbell DistinguishedSM and Martindale-Hubbell NotableSM are certification marks used under license in accordance with the Martindale-Hubbell® certification procedures, standards and policies.

  • Member, American Bar Association
  • Member, Colorado Bar Association
  • Member, Denver Bar Association
  • Member, Faculty of Federal Advocates


  • J.D., University of Colorado Law School, 1991
    • Order of the Coif
    • Notes and Comments Editor, University of Colorado Law Review
  • B.S., summa cum laude, University of South Dakota, 1988
  • Judge Jim R. Carrigan, U.S. District Court for the District of Colorado
  • Colorado
  • New York
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. Court of Appeals for the Tenth Circuit
  • U.S. District Court for the District of Colorado