Typically, priests are selected for auxiliary bishop – the first rung
up the hierarchical career ladder – from those who have distinguished
themselves working for the (arch)diocese. For example, the new auxiliary
bishop in Philadelphia had been coordinator and spiritual director of
the archdiocesan seminary, an auditor and had served on three boards for the archdiocese in addition to heading five parishes
At the time he was chosen in 1992 as auxiliary bishop for the Archdiocese of Buenos Aires, Fr. Jorge Mario Bergoglio was assigned to the Jesuit Church in the city of Córdoba, 435 miles northwest of Buenos Aires, and had never held a position working for the archdiocese.
https://opentabernacle.wordpress.com/2016/06/22/the-rise-of-pope-francis/
At the time he was chosen in 1992 as auxiliary bishop for the Archdiocese of Buenos Aires, Fr. Jorge Mario Bergoglio was assigned to the Jesuit Church in the city of Córdoba, 435 miles northwest of Buenos Aires, and had never held a position working for the archdiocese.
https://opentabernacle.wordpress.com/2016/06/22/the-rise-of-pope-francis/