From 1980 to 1984 Depo continued his studies, and in 1982 he obtained a bachelor's degree, and in 1984 a doctorate based on the dissertation of kerygmatic Christ in the teaching of Martin Kähler, written under the guidance of Fr.

[1] In the diocese of Radom he was the director of the consecrated life of women's religious orders, he was also a member of the priesthood council and the college of consultants.

[2] On 5 August 2006, after Pope Benedict XVI accepted the resignation of Jan Śrutwa, Depo was appointed as the new diocesan bishop of the diocese of Zamość-Lubaczów.

[1] Depo chose the phrase "Ad Christum Redemptorem hominis" (Towards Christ the Redeemer of man) as his bishop's motto.

[7] During the COVID-19 pandemic in Poland, Depo claimed that war and gender ideology posed bigger threats to the Polish people than the coronavirus.