 In 1982-1983 Koubetch was vicar of the Ivai parish.From 1983 to 1988 he was vicar of the parish in Prudentopolis and teacher and spiritual guide in the minor seminary in Prudentopolis.From 1989 to 1990 teacher in the diocesan seminary, from 1990-1991 pastor in São Paulo, from 1991-1996 Koubetch was diocesan Apostleship of Prayer leader, teacher in the diocesan seminary, and since 1992 head of the Basilian training center in Curitiba.