During his studies, Stephen obtained the title of magister and, as canon, he also held a benefice in the cathedral chapter of Padua.
[2] Succeeding Ladislaus Aba, Stephen was made vice-chancellor in the royal court of Andrew III sometime in the early months of 1300.
The delegation, including Stephen, resided already in Naples in late June 1303, where they met Charles II and Mary, grandparents of the Hungarian monarch.
He was made vice-chancellor of Charles' court after the death of Gregory Bicskei in September 1303 (appearing in two documents in this capacity, but without the mention of his ecclesiastical office).
[1] Aladár Szabó considered that Stephen initially supported Wenceslaus (becoming his vice-chancellor), but thereafter switched to the partisans of Charles.