Haihuwar sa kuma ya mutu a Spain, José de Gálvez ya kasance, tun yana ƙarami, mutum ne mai cikakken manufofin siyasa.
Ya kasance lauya ga ofishin jakadancin Spain a Faransa, sakataren Marquis Jerónimo Grimaldi a cikin 1761 kuma, magajin gida da kotu lokacin da Sarki Carlos III ya nada shi bako na musamman na New Spain tare da kwamiti na musamman na kula da mulkin Viceroy Joaquín de Montserrat Galavez ya isa New Spain a shekarar 1761 tare da halayyar wani minista mai rige-rige na Majalisar Indiyawa amma bai yi aiki ba har sai a shekarar 1764, lokacin da ya karɓi cikakken iko kuma ya zama Babban baƙon dukkan Kotunan da Royal Cajas. kuma Mai niyya ga dukkan Sojojin.
A sabon mukamin nasa, ya dauki mataimakin magajin Montserrat zuwa kotu, ya kirkiro shagon taba, ya gabatar da sabon haraji kan juzu'i da fulawa, ya yaki fasa kwauri, ya sake tsarin kwastam na Veracruz da Acapulco, ya maye gurbin tsarin ba da haraji da wani, wanda ake kira taken, kuma ya kafa lissafin kuɗin kuɗin birni, duk wannan ban da sake dawo da matsayin jama'a tare da kora daga aiki. Kudaden haraji sun kasance daga miliyan 6 a cikin 1763 zuwa miliyan 12 a cikin 1773.
A cikin 1765 ya sake tsara rundunar ya kuma gabatar da mataimakin magajin Montserrat a gaban shari'a, wanda aka maye gurbinsa da Carlos Francisco de Croix, wanda ya sauƙaƙa aikinsa. Shekaru biyu bayan haka, Gálvez ya shiga tsakani don kwantar da tarzoma da tarzoma da ta haifar da korar ofan Jesuit kuma ya ba da umarnin taƙaita shari’u, kisa, da ɗauri na dindindin.
Tare da ɓacewar Society of Jesús Gálvez, ya ƙarfafa waƙoƙin Franciscan a cikin Californias ta hanyar umarnin sarki. Ya kafa sansanin sojan ruwa a San Blas kuma ya hango balaguron Fray Junípero Serra - wanda ya kafa aikin San Diego - da Gaspar de Portolá - wanda ya kafa aikin Monterrey da San Carlos, kuma a ƙarshen 1771 ya isa bakin kogin San Francisco.
José de Galvéz ya dawo Spain a 1772 a matsayin memba na Babban Kwamitin Kudin Kuɗi da Cinikin Ma'adanai, Gwamnan Majalisar Indies kuma Kansila na Jiha. Don ayyukan da aka yi, Carlos III ya ba shi lada ta hanyar sanya masa suna Marquis na Sonora da Ministan Universal na Indiya.
Bashin Gálvez bashi na arewacin New Spain, tunda kamar yadda Ministan Sarki ya kirkiro General Command of Internal Lardun da suka hada Nueva Vizcaya, Sinaloa, Sonora, Californias, Coahuila, New Mexico da Texas, suna bayarwa Chihuahua halin babban birni.
