Born in Slobozia Rarancei, in Austrian-ruled Bukovina, his father was a Romanian Orthodox priest.
In 1918, the year Bukovina was integrated into Greater Romania, Șesan was ordained a priest; in 1920, he was made an archpriest.
[1][2] Șesan published a number of works on canon law, of interest both to Orthodox in general and to the Romanian church in particular.
He wrote a textbook published posthumously and drafted legislative proposals for unifying church administration after 1918.
His studies, articles, reviews and speeches appeared in Candela and Glasul Bucovinei at Cernăuți and in Cuvântul Preoțesc at Rădăuți.