[3][4][5] He started playing football in the 1920–21 regional season at Universitatea Cluj, being the team's top goalscorer in the following two with four goals, in the second one being at equal with Aurel Guga.
[2][5][7] In the following season he helped "U" win another regional title, being again the team's goalscorer with five goals but they got eliminated again in the quarter-finals, this time by UCAS Petroșani.
[5][9] In his last season spent with "U" Cluj, Bonciocat scored three goals as the team won a third regional title, then passing AMEF Arad with 3–0 in the quarter-finals of the 1926–27 national league, reaching the semi-finals where they were defeated 2–1 by the eventual champions, Chinezul Timișoara.
[3][2] Bonciocat made his debut for Romania's national team on 27 May 1924 when coach Adrian Suciu used him all the minutes in a 6–0 loss in front of Netherlands from the 1924 Summer Olympics.
[12][13] One year later, he played one more game, this time under coach Teofil Moraru, a friendly which ended with a 2–1 home loss in front of Turkey.