He replaced Joseph Garrucho at Mission Los Santos Ángeles de Guevavi after the Pima Revolt of 1751, and worked in the area until the expulsion of the Jesuits in 1767.
[1][3] Not long after, Pauer returned to take over Mission Los Santos Ángeles de Guevavi from Joseph Garrucho, who was removed from his position there as a condition of peace.
At the beginning of January 1754, he traveled through his diocese, baptizing 38 native children at Tubac, 23 at Bac, 28 at Mission San Agustín del Tucson, and 10 at Guevavi.
In October he fell sick, and went again to Suamca, where he reported on the state of his mission to the visiting Joseph de Utrera.
When Pauer returned to Guevavi, he was accompanied by Alonso Ignacio Benito Espinosa, who stayed with him while waiting for a house to be built at Bac.
[1] In July 1767, Spanish soldiers arrived to carry out the orders of Charles III by expelling the Jesuits from Mexico.