From 2004 to 2017, Carlos Matus was appointed as a Regional Security Officer (RSO) at the United States Embassy of Kabul, Afghanistan.

[2] Matus began his career at the Washington Field Office for DS where he was assigned to defending the U.S. Embassies located in Tegucigalpa, Honduras and La Paz, Bolivia until 1993.

[6][2] In 2018, Carlos Matus received two awards by the U.S. Marine Corps as Regional Security Officer (RSO) of the year for D Company.

Matus participated in numerous projects such as ensuring organization, policy, plans, and programs for Marine Corps as well as advising Secretary of Defense, National Security Council for United States Homeland Security Advisory, Office of Inspector General at United States Department of Justice (DOJ) and Secretary of Navy counterterrorism, counterintelligence and counterinsurgency operations.

Carlos Matus Senior Foreign Service (SFS) awards from Joe Biden and Antony Blinken during December 2023.