[1] On 26 May 2010, Kobiljski was added as an assistant coach of the Slovenian team ACH Volley under Igor Kolaković.

[16] On 13 March 2017, Kobiljski was named an assistant coach for the Iran national volleyball team under Igor Kolaković.

[17][18] He won two gold medals, at 2018 Asian Games in Indonesia and at the 2019 Asian Men's Volleyball Championship in Iran, as well as a bronze medal at the 2017 FIVB Volleyball Men's World Grand Champions Cup in Japan.

[19][16][20] In April 2022, Kobiljski was named an assistant coach for the Serbia national team under Igor Kolaković.

[21][22] His 13-year-old daughter (Ema Kobiljski) was killed in the Belgrade school shooting on 3 May 2023 along with 9 other students and a security guard.