 He studied at the Germanicum in Rome and in 1578 was made a cathedral-preacher in Konstanz, then on his deposition from that post in 1585 as visitor to the bishopric of Konstanz.From 1586 he was spiritual overseer of the diocese of Regensburg.In Regensburg Miller tried to set up a Jesuit college, wrote new diocesan constitutions and enforced the decisions of the Council of Trent in the diocese.