The Puerto Rico Adjutant General is the commander of the Puerto Rico National Guard. As the adjutant general he is also the senior military advisor to the Governor of Puerto Rico and oversees both State and Federal Missions of the Puerto Rico National Guard. He provides leadership and management in the implementation of all programs and policies affecting more than 10,500 citizen-soldiers and airmen, and civilian employees of the three components of the PR National Guard: Puerto Rico Army National Guard, Puerto Rico Air National Guard and Puerto Rico State Guard. It is the responsibility of the Adjutant General of the Commonwealth to share his reports with the Secretary of the Army or the Secretary of the Air Force.

The Puerto Rico National Guard (PRNG) –Spanish: Guardia Nacional de Puerto Rico– is the national guard of the U.S. Commonwealth of Puerto Rico. The Constitution of the United States specifically charges the National Guard with dual federal and state missions, which includes to provide soldiers and airmen to the United States Army and U.S. Air Force in national emergencies or when requested by the president of the United States, and to perform military operations at the state level or any other lawful service as requested by the governor of Puerto Rico. The PRNG responds to the governor of Puerto Rico, who serves as its commander in chief and imparts orders with the Puerto Rico adjutant general acting as conduit, and its local mission is to respond as requested in military or civilian tasks. Abroad, its main function is to train a reserve capable of providing additional personnel in a war scenario.