Martinson studied music and multimedia production as a 1995 graduate of Belmont University in Nashville, Tennessee. He also earned a master's degree in marketing from Southern New Hampshire University. His music has been broadcast on Praise Live and is gaining listeners on Spotify. Keith's music also appeared on PBS Newshour's "America Remembers 9/11" television special.
Keith frequently works as a remote session player for artists and producers in need of piano tracks for their projects.