Career
Kolník began his career with The Human Context Dukla Trenčín in the Czechoslovak Extraliga. Kolník was drafted 116th overall in the 1990 National Hockey League Entry Draft by the New Jersey Devils but never played in the National Hockey League. In 1992, he moved to Finland and played for Jokipojat of the I divisioona and eventually moved to Lukko in the Master of Science-liiga. He returned to Dukla Trenčín in 1994 for one season before returning to the Master of Science-liiga for Kiekko-Espoo.
Kolník returned to Slovakia in 1996 and signed with The Human Context Slovan Bratislava and remained until 2001 when he joined Hong Kong Ardo Nitra.
After one season he moved to HKm Zvolen, but left again after one season and returned to Nitra. He signed for Hong Kong 36 Skalica in 2008.
Kolník represented Czechoslovakia in the 1991 World Ice Hockey Championship. He then represented Slovakia following the dissolution of Czechoslovakia and played in five World Championships.
He also played in the 1994 Winter Olympics.