In 1987, Brion moved to Boston, where he played solo gigs, formed the short-lived band World's Fair and became a member of the last touring version of Aimee Mann's new wave band 'Til Tuesday. He contributed guitar work to Jellyfish's 1993 album Spilt Milk, and in 1994, joined Dan McCarroll, Buddy Judge and ex-Jellyfish Guitarist Jason Falkner in the short-lived pop band The Grays. He also played guitar on The Wallflowers' hit song "One Headlight." Brion played numerous instruments on Sam Phillips' 1996 release Omnipop. Brion is featured as keyboardist and Drummer on Marianne Faithfull's 2003 album, Kissin Time, and co-wrote a song, "City of Quartz", for her next work, 2005's Before the Poison.