Mesík first competed at World Cup level in the 1995–96 season, and was for a long time the only Slovak ski jumper; he also had to train by himself.

Mesík retired from ski jumping a year later and currently lives in Selce.

During his active career he was 183 cm tall, and his weight was 64 kg.

In the World Ski Championships in Trondheim 1997 he ended up on 20th place in the Large Hill competition.

This biographical article relating to Slovak ski jumping is a stub.