
Defense, Intelligence & Government Relations
Matthew Jemmott
Retired United States Army Colonel and defense-policy advisor; former 19th Commander of Joint Task Force Guantanamo — counsel on US defense, intelligence interface, and government-relations discipline.
Matthew Jemmott is a retired United States Army Colonel and defense-policy advisor whose career spans more than three decades in military police leadership, joint command, and national-security government relations. He served as the 19th Commander of Joint Task Force Guantanamo (JTF-GTMO) from June 2023 to February 2024 — the first Army Colonel to lead the organisation — following prior service as Joint Detention Group Commander and JTF-GTMO Deputy Commander, and earlier as Operations Officer of the 525th Military Police Battalion and of the Joint Detention Group. He now advises through Cross Potomac Consulting, a Capitol Hill government-relations firm focused on national-security policy, defense and intelligence community budgets, congressional appropriations and authorizations, and strategic counseling of corporate counterparties engaging the Department of Defense and Congress. His counsel to PWX centres on US defense and intelligence interface, government-relations discipline, and the institutional channels required for a multi-jurisdiction permanent-capital platform operating with US regulatory and national-security reality.
Selected experience
- Retired United States Army Colonel; more than three decades in military police leadership, joint command, and national-security government relations.
- 19th Commander of Joint Task Force Guantanamo (JTF-GTMO), June 2023–February 2024 — the first Army Colonel to lead the organisation.
- Prior service as Joint Detention Group Commander, JTF-GTMO Deputy Commander, and Operations Officer of the 525th Military Police Battalion.
- Advises through Cross Potomac Consulting on national-security policy, defense and intelligence community budgets, and congressional appropriations and authorizations.















