Tuominen attended St. Peter's College, Adelaide where he studied drama.

At Age 21, he graduated from the prestigious school National Institute of Dramatic Art in Sydney.

Tuominen married Stephanie Horlin-Smith in 2018 in Adelaide, South Australia.

He reprised his role as Hunter in a guest appearance for two episodes of Power Rangers Dino Thunder in 2004.

In 2006, he appeared as a guest in an episode of the series McLeod's Daughters where he played John Nostier, and in 2008, he appeared on stage in Melborn08's Playspotting at the La Mama Courthouse Theatre, where he played three different roles - A Cup of Sugar, The Trick and Lovely Bits.