Sean Gallagher has spent more than 30 years fighting for his clients in boardrooms and courtrooms across the country, and is one of only a handful of lawyers in Colorado history to have argued a case in the Supreme Court of the United States and prevailed with a unanimous decision.

Sean has been elected by his peers as a Fellow in the College of Labor and Employment Lawyers for his "sustained outstanding performance in the profession." The Chambers USA guide has recognized Sean's "extensive work in bet-the-company cases, matters involving substantial public policy and constitutional issues, and employment litigation," and quoted one client saying "Sean is a life-saver during a difficult dispute" and that "he would be my first choice if the situation arose again". Colorado Super Lawyers has recognized Sean as one of the Top 100 lawyers in Colorado.

His representative commercial litigation experience includes cases involving regulatory disputes, claims for breach of contract, common law fraud, securities fraud, defamation, unfair competition, consumer protection violations, theft of intellectual property, whistleblowing, ERISA, Medicare payer rules, state and local tax matters and corporate governance disputes.

Many of Sean’s cases involve disputes in which the client’s business interests collide with government regulations and policies, often in a very public way. Sean has represented companies, trade associations, political leaders and public servants with a broad spectrum of public policy, constitutional, and election matters, including several First Amendment cases of national significance. He has also represented clients in high-profile regulatory disputes, including representing a gas marketing company in a state court action against the Colorado Public Utilities Commission and Xcel Energy, challenging a nearly $2.6 million penalty.

Sean has served as national counsel for three presidential campaigns, has twice been appointed a Special Assistant Attorney General by the State of Colorado, and has been retained on multiple occasions by the U.S. Department of Justice to represent federal officials in civil litigation. He successfully represented two U.S. Secret Service agents in the Supreme Court of the United States in Reichle v. Howards, 566 U.S. ___ (2012) where he obtained a unanimous decision on behalf of his clients in a case involving the scope of civil liability of Secret Service agents protecting the President and Vice President.

As a member of the firm’s Labor and Employment practice, Sean assists employers in implementing proactive employment policies that help minimize the risk of litigation. When necessary, however, he represents management in all aspects of employment litigation, including cases involving covenants not to compete, wage and hour violations, breach of fiduciary duty and discrimination.

As an adjunct to his litigation practice, Sean is nationally recognized for his experience in the field of electronic discovery. He is a member of The Sedona Conference’s Working Group on Best Practices for Electronic Document Retention and Production and helped lead a team that drafted the conference’s commentary on Proportionality in the e-Discovery Process. A sought-after speaker, Sean has lectured at more than 150 programs across the country on litigation, ethics, and electronic discovery matters. He has served as an adjunct professor at the University of Colorado Law School, where he taught Electronic Discovery.