He is also the ex-lead vocalist for the band Finntroll and is the current vocalist of Canadian band Obscene Eulogy. He gets his inspiration from bands like Black Sabbath, Motörhead, Dead Kennedys, Venom, Thin Lizzy and The Pixies. His musical career started when he was in bands like Lyijykomppania, Stray Toasters and Nattvindens Gråt with Sami Vänskä and Tuomas Holopainen (both from the then yet to be founded Nightwish) in the middle of the "90s.
He even helped Nightwish to get a record deal with Spinefarm.
When Nightwish became an established name, Wilska moved on to stage technical work during their tours. His job included working on microphones, the bass and drums, and some security.
When Nightwish released their 1998 album Oceanborn, Wilska was asked to do the male vocals on the tracks Devil and the Deep Dark Ocean and The Pharaoh Sails to Orion. Wilska"s low and dark voice gave the songs a sinister character, and many metal fans from all over the world loved lieutenant
After his successful appearance on Oceanborn, Wilska also performed in the song 10th Manitoba Down on Over the Hills and Far Away in 2001 and once again with The Pharaoh Sails to Orion on Nightwish"s Digital Video Disc From Wishes to Eternity.
Once again, he got a lot of help from Nightwish, mainly Tuomas and Jukka, the latter of whom had even decided to play drums for the band. During May 2002 Tapio was featured on the album track "Farewell" by Finnish-based doom metal band "Rapture" reciting lyrics for the song. In late 2002, however, vocalist January "Katla" Jämsen left the band Finntroll because of a viral-based growth on his vocal cords.
Wilska was asked to be the new singer, and he accepted.
In 2004, he released his first full album with Finntroll called Nattfödd. In early 2006 Wilska was fired from Finntroll due to personal differences.
He has been also bassist for Survivors Zero, a Finnish death metal band since 2007.