About Sean R.
Sean R. Gallagher has spent a long legal career built on steady courtroom work and appellate filings. He began his legal journey in the 1980s and has steadily moved into matters that reach beyond state trial courts.
He earned a J.D. from The University of Denver Sturm College of Law in 1987 after completing a B.A. at Baylor University in 1984. The combination of a Texas undergraduate education and a Denver law degree shaped an attorney comfortable in regional and national settings. His academic record provided the foundation for a practice that crosses both state and federal lines.
Gallagher has practiced law since the late 1980s. Over the years he has handled matters that required federal appellate admission and appearances before higher courts. Those experiences gave him repeated exposure to briefing, oral argument and the procedural demands of appeals.
He is admitted to the Colorado bar and holds admissions to the Ninth and Tenth U.S. Circuit Courts of Appeal, as well as the U.S. Supreme Court. Those credentials permit him to take cases to the appellate level and to address issues in multiple federal jurisdictions. He is comfortable drafting complex appellate briefs and preparing clients for argument, work that requires precise legal writing and an eye for preserving issues below.
Gallagher maintains memberships in the American Bar Association and the Colorado Bar Association. He participates in bar activities that relate to appellate practice and federal litigation, and he keeps current on evolving precedent and procedure through those professional networks.
He is affiliated with Polsinelli PC, where he contributes to the firm’s litigation capabilities. Colleagues describe him as methodical in case preparation and clear in courtroom presentation. His experience in appellate settings informs how he approaches cases from the outset, aiming to preserve appellate issues and structure dispute records for potential review.
After decades in practice, Gallagher focuses his current work on matters that often involve federal courts and appeals. He currently practices at Polsinelli PC, where his work centers on appellate and federal litigation.
