Teräväinen is best known for portraying Sam Fisher or zero in video games, Deputy Labelle in Eli Roth's Thanksgiving[1] and his recurring roles on the TV shows[2][3] Dark Matter as Lieutenant Anders[4] and as Agent Stack on 12 Monkeys.
Jeff has voiced many characters for best selling video games like Far Cry 5 as Walker and various cult soldiers.
Tom Clancy's Splinter Cell: Blacklist in various roles and Far Cry 2 as Walton Purefoy.
In 2019 he was cast as a series regular in the Sci-fi drama Utopia Falls which was released on Hulu February 14, 2020.
In 2024 Jeff was tapped to narrate Gordon Ramsay's FOX show "America's Next Food Star".