Colonel (Ret.) Sean Welch, Former Marine Corps Operations and Logistics Leader, Joins Pallas Advisors

Col. (Ret.) Sean Welch

Washington, DC — Pallas Advisors is pleased to announce that Colonel (Ret.) Sean Welch has joined the firm as a Principal. Welch transitions to the private sector following a distinguished 30-year career in the United States Marine Corps, bringing a wealth of expertise in global operations, logistics, force design and development, planning, and legislative affairs.

Welch most recently served as the Operations Officer (G-3) for the Marine Corps Training and Education Command, where he spearheaded force development and enterprise-wide training initiatives. His deep operational background includes serving as the Logistics Officer (G-4) for III Marine Expeditionary Force in Okinawa, Japan, where he directed complex sustainment operations across the Indo-Pacific, from the Korean Peninsula to Singapore.

“Sean brings a unique combination of operational leadership, logistics expertise, and strategic insight to Pallas,” said Sally Donnelly, Founding Partner at Pallas Advisors. “His ability to navigate the spectrum from tactical execution to high-level national security strategy makes him an exceptional addition to our team.”

Throughout his career, Welch has held pivotal roles within the Joint Staff, Marine Corps Combat Development and Integration (CD&I), and the Marine Corps Warfighting Laboratory. With significant experience in force design and concept development, he has also served as a legislative liaison on Capitol Hill and currently contributes to national security discourse as a Non-Resident Senior Fellow with the Atlantic Council’s Forward Defense program.

“I am honored to join Pallas Advisors,” said Col. Welch. “I’ve spent my career connecting national strategic planning to tactical actions. At Pallas, I look forward to helping organizations translate complex defense challenges into actionable strategies that contribute to warfighting advantage, innovation, and national security.”

Welch is a graduate of Western Illinois University, the Marine Corps University’s Command and Staff College, and the Dwight D. Eisenhower School for National Security and Resource Strategy.