Fr. Trainer was ordained to the priesthood on 31 May 1958 as a member of the Missionaries of the Sacred Heart. He came to minister in our Diocese in 1985.
He served in the parishes of Sacred Heart / Turlock, St. Stanislaus / Modesto, Our Lady of the Assumption / Turlock, Cathedral of the Annunciation / Stockton, St Anne / Lodi, St George / Stockton, Our Lady of Fatima / Modesto, St Linus / Stockton, St Anthony / Hughson, and St Patrick / Angels Camp.
He retired from active ministry and moved back to Wisconsin in November 2004.