Rear Admiral Miller was born in Puerto Montt on March 28, 1962. After completing his studies at Colegio San Francisco Javier in his hometown, he entered the Arturo Prat Naval Academy, graduating as midshipman on January 1, 1984.
He is a specialist in submarines and chief of staff. He is a weapons engineer with a specialization in submarines and holds a master's degree in naval and maritime sciences as well as a diploma in finance and administration from the Maritime University of Viña del Mar. He completed a course in submarine command in 2005 and obtained a qualification for future submarine commanders from the Navy of Brazil in 2006.
During his naval career, he served for more than 15 years aboard different vessels, including: the barge Elicura, the patrol ship Micalvi, and the submarines Thomson, Simpson, O'Brien, and Hyatt. He was commander of SS Hyatt in 1999 and of the patrol ship Micalvi in 2003 in Puerto Williams. In 2007 and 2008 he was commander of the submarine Simpson; in both of those years, he was deployed with his unit to the Diesel Electrical Submarine Initiative (DESI) on the East Coast of the United States, operating with the Third Fleet and carrying out the 2008 Chilemar rescue exercise.
His destinations on land include his work as division officer of the Arturo Prat Naval Academy, head of the Division of Submarines and Torpedos of the Engineering and Naval Systems Directorate, chairman of chief of staff of the Beagle Naval District, head of the Operations Department, and chairman of chief of staff of the Submarine Force. He was naval and defense attaché at the Embassy of Chile in Brazil, department head of the Intelligence Directorate of the Defense for the Joint Chiefs of Staff, and assistant director of education of the Navy.
On December 10, 2015, he became Commander in Chief of the Submarine Force and was sworn in as commodore on the 30th of that month.
On January 1, 2016, he was promoted to the rank of rear admiral by the Chilean government.
Rear Admiral Miller is married to Mrs. Mercedes Aparicio and is the father of three children: Paulette, Francisco Javier, and Hernán Felipe.
Dentro de sus destinaciones en tierra, se ha desempeñado como Oficial de División de la Escuela Naval “Arturo Prat”, Jefe de la División de Submarinos y Torpedos de la Dirección de Ingeniería de Sistemas Navales, Jefe del Estado Mayor del Distrito Naval Beagle, Jefe del Departamento de Operaciones y Jefe de Estado Mayor de la Fuerza de Submarinos. Fue Agregado de Defensa y Naval en la Embajada de Chile en Brasil, Jefe de Departamento de la Dirección de Inteligencia de la Defensa del Estado Mayor Conjunto y Subdirector de Educación de la Armada.
Con fecha 10 de diciembre asume como Comandante en Jefe de la Fuerza de Submarinos, siendo investido como Comodoro el día 30 del mismo mes.
El 1 de enero de 2016 el Supremo Gobierno le confiere el ascenso al grado de Contraalmirante.
El Contralmirante Miller es casado con la Sra. Mercedes Aparicio, y es padre de tres hijos: Paulette, Francisco Javier y Hernán Felipe.