Thomas Jacob Bergersen (born July 4, 1980) is a Norwegian composer, multi-instrumentalist, and the co-founder of the production music company, Two Steps From Hell. He is best known for writing music for high profile theatrical trailers.

Bergersen started his musical career as a demoscener, writing tracked modules under the name Lioz in the group Index. The release of a 2007 trance-genre single titled "Remember September" saw Bergersen team with fellow Norwegian artist Boom Jinx.