He moved to the seminary of the Diocese of Genoa, where he met Philippe Mora, who would be his friend and co-founder of the Institute of Christ the King Sovereign Priest.

[1] He pursued his studies in Rome, residing at the Pontifical Irish College while studying for his doctorate in Theology at the Pontifical University of Saint Thomas Aquinas, with his thesis on St. Francis of Sales, Pédagogie de l'amour.

He founded the Institute of Christ the King Sovereign Priest with Philippe Mora in 1990, a society of apostolic life, which was granted pontifical right in 2008.

[3] On 24 June 2024, Wach, accompanied by Rudolf Michael Schmitz, was received in a private audience with Pope Francis.

According to the ICKSP, the Pope insisted that the institute "continue to serve the Church according to our own proper charism.