Brian L. Duffy: Lawyer with Greenberg Traurig, LLP

Brian L. Duffy

Shareholder; Chief Executive Officer
Denver,  CO  U.S.A.

Peer Rating
AV® Preeminent

Client Rating

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Experience & Credentials Ratings & Reviews

Practice Areas

  • Litigation
  • Appellate
  • Retail
  • Labor & Employment
  • Global Energy & Infrastructure
  • Foreign Corruption Practices Act (FCPA) & Global Anti-Corruption
Contact InfoTelephone: 303.572.6545
Fax: 303.572.6540
University University of South Dakota, B.S., summa cum laude, 1988
Law SchoolUniversity of Colorado School of Law, J.D., 1991 Order of the Coif, Notes and Comments Editor, University of Colorado Law Review
Admitted1991, 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

Professional & Community Involvement

•Member, American Bar Association
•Chairman, Energy Litigation Committee, 1999-2001
•Held numerous leadership positions since 1993
•Member, Colorado Bar Association
•Member, Denver Bar Association
•Member, Faculty of Federal Advocates


Brian L. Duffy is the Chief Executive Officer of the firm and previously served as a Co-President and Chair of the firm's 600-member Global Litigation Department from 2009-2013. He 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. Brian represents public and privately held entities and their principals in complex business-related disputes arising from both internal and external sources. Brian focuses on a broad array of industries including consumer goods and retail, food processing and restaurants, and energy and natural resources.

Brian has handled numerous jury and non-jury trials, bench trials, proceedings before arbitration tribunals, mediation sessions, and appeals in state, federal and alternative dispute resolution settings throughout the country.

In class action defense, Brian formulates a case strategy which includes a variety of tactics from arguments to win on summary judgment, defeating class certification, or negotiating a favorable settlement. When necessary, Brian can also build a team to take a case to trial and successfully to verdict. Brian's objective is to independently analyze claims while developing strategies designed to achieve an early and cost-effective resolution.

Brian's employment practice includes wage and hour claims, employment breach of contract, discrimination defense, whistleblower and wrongful termination defense. He also assists clients with a variety of contract and business tort and disputes, including breach of contract, breach of fiduciary duty and unfair competition.

Areas of Concentration


Awards & Recognition

•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
•Listed, The Best Lawyers in America, Commercial Litigation; Litigation - Labor and Employment, 2010-2015
•Listed, Super Lawyers magazine, Colorado Super Lawyers, 2006-2015
•Listed, Chambers USA Guide, 2013-2015
•Team Member, a Law360 Employment Practice Group of the Year, 2011 & 2013
•Listed, The Legal 500 United States, Product Liability and Mass Tort Defense, 2011
•Team Member, a Law360 Product Liability Practice Group of the Year, 2011
•Named, Client Service All Star, BTI Client Service All-Stars Report, 2010-2011
•Team Member, a Law360 Appellate Practice Group of the Year, 2010
•Rated, AV Preeminent 5.0 out of 5

AV, BV, AV Preeminent and BV Distinguished are registered certification marks of Reed Elsevier Properties Inc., used under in accordance with the Martindale-Hubbell certification procedures, standards and policies.

Associated News & Events

Press Releases

01.11.16 Greenberg Traurig Senior Leadership Team Expansion Confirmed
11.03.15 Greenberg Traurig Named 'Law Firm of the Year' for Environmental Law
07.21.15 Greenberg Traurig Expands Senior Leadership Team
05.22.15 Greenberg Traurig Attorneys, Practices Included in the 2015 Chambers USA Guide
04.23.15 KIND Honors Greenberg Traurig with Pro Bono Award
03.26.15 Greenberg Traurig's Duffy and Palmer Receive CU Law School 2015 Alumni Award
11.14.14 Greenberg Traurig's Environmental Practice Receives Top Tier Rankings in U.S. News - Best Lawyers 2015 'Best Law Firms' List
05.23.14 Greenberg Traurig Attorneys, Practices Included in 2014 Chambers USA Guide
08.16.13 12 Greenberg Traurig Denver Attorneys Included in 2014 Edition of Best Lawyers in America
05.28.13 Chambers USA Guide 2013 Includes 171 Greenberg Traurig Attorneys, 33 Practice Areas

Articles, Publications, & Lectures

•Interviewed, Delivering Value, Leaders Magazine, Volume 38, Number 3, Summer 2015


•Judicial Clerk, Judge Jim R. Carrigan, United States District Court for the District of Colorado

Reported CasesSignificant Representations; 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 35 putative wage and hour class actions. Acted as lead defense counsel in MDL 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 twelve people. The jury returned a defense verdict on all claims.

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Office Information

Brian L. Duffy

1200 17th Street, Suite 2400
DenverCO 80202


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