Vnuk began his career in the youth teams of his home club HDD Olimpija Ljubljana , before he played for the first time in the fighting team in the Yugoslav ice hockey league in 1987 . In the 1989/90 season he tried briefly abroad and completed twenty games for the Medicine Hat Tigers in the Canadian Junior Western Hockey League , but soon returned to Laibach. Over the years he developed into one of the most important players of the Ljubljana Ice Hockey League and was among the top ten scorer lists of the Slovenian Ice Hockey League every season, playing for HK Celje from 1992 to 1994 . With Olimpija Ljubljana he was Slovenian champion three times in a row in 1995, 1996 and 1997 . He then ventured abroad again and switched to the then very successful VEU Feldkirch in the Austrian ice hockey league . With Feldkirch he won the Alpine League in 1998 and 1999, the Austrian championship title in 1998 and the European Hockey League in the 1997/98 season . After the end of the season in Austria, he joined his home team from Ljubljana in the playoffs in 1998 and was again Slovenian champions with them.
After the financially conditioned end of Feldkirch, he came back to Laibach. After his return he won another three championship titles with Olimpija in 2000, 2001 and 2002. He then rejoined the VEU Feldkirch, which in the meantime had resumed gaming in the top Austrian league, and played for the club from 2002 to 2004. This was followed by a season each at EC VSV and the Slovenian club HK Alfa , before he was on the ice in the 2006/07 season at the Slovenian representative HK Jesenice , who was newly admitted to the Austrian league . For the 2007/08 season he returned one more time to his home club Olimpija Ljubljana. There he let his active career end; at the age of forty, he played his last league game in the 2009/10 season and was honored by the club's board of directors for his services during the first third break. On August 28, 2010, a farewell game between a selection of players who have accompanied Vnuk through his career and his home club took place in his honor.