[3] A graduate of the General Staff , he has specialized military training in anti-aircraft artillery (fire control systems and target detection and location).

Cartagena, Las Palmas de Gran Canaria and Paterna ( Valencia ), allowing him to reach the rank of captain.

Two years later he was promoted to Head of the Governing Body of the General Directorate of Recruitment and Military Training of the Ministry of Defense.

General Domínguez Buj has also been assigned to several United Nations peacekeeping missions abroad (in El Salvador and Bosnia-Herzegovina).

During the period in which Jaime Domínguez Buj was in charge of the Army General Staff, a deep reorganization took place, initiated in 2015, with which it was intended to increase the operability of the different units, adapting their level of response to the new needs of the land doctrine.