Jeffrey Thoralf Heisholt (born July 28, 1975 in Thunder Bay, Ontario) is a Canadian keyboardist, vocalist, songwriter, and producer. In 1996 he formed Burt Neilson Band, with whom he co-wrote and released four records, toured Canada twenty times, played more than 1000 shows and became a staple of the Canadian jamband community. Since 2004, he has played across the country with soul-rocker Peter Elkas and contributed to Elkas's second album, the Charlie Sexton produced Wall of Fire.