US guitarist/singer/songwriter based in New York, NY. After he broke up his duo with sister Jean Thomas, he kept on writing and playing, most notably for The Monkees, Van Morrison, Dave Berry (Don't Gimme No Lip Child) and Al Gorgoni's productions. Often associated to the publisher Painted Desert Music Corp. when co-writing with Barry Richards (A Little Bit Of Happiness), to Blackwood Music Inc. when co-writing with Estelle Levitt (This Door Swings Both Ways, Love Loves To Love Love) or to Ashland Music Corp. when co-writing with Bill Szymczyk.

Do not confuse with Don Thomas who wrote and performed the northern soul classic Come On Train.