[1] Kustudić spent most of his career with Spartak Subotica, helping the club win promotion to the Yugoslav First League in 1972.
He also played for Rudar Velenje in the Yugoslav Second League between 1977 and 1980.
Kustudić started his managerial career at Spartak Subotica, leading them to promotion to the Yugoslav First League in 1986.
He was also manager of Hungarian clubs Fehérvár and Nagykanizsa.
[2] Later in his managerial career, Kustudić led several lower league clubs in his homeland, including Borac Šabac,[3] Tisa Adorjan, and Sloga Čonoplja.