With partner Sylwia Nowak, he is the 1998 Skate Canada International bronze medalist, 1999 Cup of Russia bronze medalist, 1994 World Junior champion, and a nine-time Polish national champion.

[1] He has a daughter, Jagoda (born in 2002), with his ex-wife, Jagna Marczułajtis, an Olympic snowboarder.

[1][2] Early in his career, Kolasiński had a brief partnership with Agnieszka Domańska.

In 1991, coaches paired him with Sylwia Nowak,[3] with whom he competed for the rest of his career.

[4] As seniors, Nowak/Kolasiński won gold medals at the Nebelhorn Trophy, Finlandia Trophy, and Karl Schäfer Memorial and bronze medals at two Grand Prix competitions, Skate Canada International and Cup of Russia.