As a steel guitarist, Harm likes to explore all the possibilities of the instrument, and is a big admirer of the early pioneers Joaquin Murphey, Herb Remington, Maurice Anderson, Curly Chalker, and Jerry Byrd, but is equally inspired by the more recent trailblazers Lionel Wendling, Mike Neer and Mike Perlowin.
Appeared at various steel guitar events and as a special guest with various bands.
Recorded, toured and performed on pedal steel with the following
Bart Dietvorst "To The Moon And Back"
Bart Dietvorst "Twangy Tunes"
Diane Van Deurzen & Lisa Otey "Meet Me Under The Mistletoe"
Diane Van Deurzen & Lisa Otey "Wild Women"
Frank van Engelen "De Mist"
The Freelance Band "Out Of The Calaboose"
The Implosions "No Strings"
Jaap De Jonckheere "Storm Part 1 & 2"
John Frick Band "Let The Party Begin"
Judith Nijland "A Jazz Tribute To Abba"
Kraak & Smaak "All I Need (feat. iogi)"
Leo Koster Band "Train Of Life"
Outlaw Express "Crowded Room"
Spinvis "Dagen Van Gras, Dagen Van Stro"
Will Matla "New Orleans"