With Gorica, Osmanović finished second in the 1999–2000 season of the First League, entered the semi-finals of the 1999–2000 Slovenian Football Cup and played four matches on the UEFA Cup. That made it one of the club's most successful seasons. With Korotan, he won the Slovenian Indoor Soccer All-Stars Competition. With Dravograd, he became the runner-up of the 2003–04 Slovenian Football Cup. He also worked with other coaches like Stanko Poklepović; he was his assistant coach at Celje before taking over the position of head coach.