Honoring Valor Across Generations The 43rd Colorado All Service Academy Ball

COLONEL TROY L. ENDICOTT

Colonel Sean Williams is a 29+ year veteran of the United States Army, recently retired in February 2025—but who was counting after nearly three decades of moves, deployments, and uniforms? A native of Harleysville, Pennsylvania and a proud graduate of the United States Military Academy Class of 1995, Sean spent most of his career as a Green Beret in the Army’s Special Forces, operating routinely alongside the joint force and leading Soldiers from the tactical edge to the strategic level. His service included six combat tours in Iraq and Afghanistan, command at multiple echelons, and senior roles including Deputy Executive Officer to the 38th Chief of Staff of the Army, Garrison Commander of Fort Wainwright, Alaska; Chief of Staff of U.S. Army Alaska; and Chief of Staff of Installation Management Command, responsible for Army installations around the world. 

At his core, Sean is a husband and a father, and the resilience of his family—through 13 moves and years of deployments—remains the foundation of everything he has accomplished.

Today, Sean continues his commitment to national security with KPMG LLP as part of Federal Advisory Services, where he works with the Department of War to help protect the nation’s critical infrastructure and find better, smarter ways for the enterprise to operate. His transition reminded him that purpose doesn’t end with a DD-214; it simply takes a new form.

Sean’s transition was shaped deeply by his involvement with Salute Colorado and the Special Operators Transition Foundation—both of which grounded him in authenticity, humility, and the powerful reminder to “slow down.” He remains an active member of the Salute Colorado community, supporting fellow veterans and contributing wherever he can.

Service has always extended beyond the uniform. Sean volunteers as a coach for girls’ high school flag football, mentors candidates for West Point as part of the Admissions Field Force, and stays engaged through KPMG’s Veterans Business Resource Group and the Highlands Ranch Metro District. Whether on a field, in a boardroom, or around a table with transitioning veterans, he continues to invest in the next generation of leaders.

Sean and his wife, Erin—his high-school sweetheart and best friend—live in Highlands Ranch, Colorado. Their son Brady is a proud member of the West Point Class of 2029, and their daughter Maggie is a Colorado high-school sophomore and tennis and flag-football athlete. As a family, they love skiing, RV trips, and embracing every adventure the mountains offer.

Above all, Sean is honored to join this year’s Colorado All-Service Academy Ball, where families, alumni, cadets, and midshipmen from West Point, Annapolis, the Air Force Academy, the Coast Guard Academy, and the Merchant Marine Academy come together to celebrate service, tradition, and the next generation of leaders. Though it is the Army’s turn to host, tonight’s event belongs to every Academy represented—a reminder that while each institution has its own proud history, our nation’s strength comes from the combined commitment of all who choose to serve.