He was the interim governor between Francisco Antonio Marin del Valle and Manuel Portillo Urrisola.
In 1751, Mendoza joined the Order of Santiago and served in the Spanish army, being a member of the Queen's Dragoons as lieutenant colonel and sergeant major.
[1] After assuming the governor's charge, he settled in Chihuahua (in modern Mexico), where he resided until he ended his administration.
In addition, Mendoza ordered the troops stationed in Carrazal to accompany and defend travelers from possible threats on the Camino Real on their way to New Mexico or from there to other places.
In 1761, Mendoza was appointed interim governor of New Mexico[1][2] by Charles III to serve between Francisco Antonio Marin del Valle and Manuel Portillo Urrisola.