Froom began his career as a keyboard player in Los Angeles. He played keyboards on the Ronnie Montrose-led group Gamma's third album Gamma 3. He then produced the first three Crowded House albums, which led to more production jobs with Richard Thompson, Los Lobos, Soul Coughing, American Music Club and Suzanne Vega, who is now his ex-wife. One early notable work, Key of Cool, later became the soundtrack for the adult film Café Flesh.
Froom collects and performs on a large number of obscure and exotic keyboard instruments. His "House of Keyboards" is mentioned in the credits for Los Lobos' Kiko.
Production credits include albums from Missy Higgins, Elvis Costello, Pearl Jam, Paul McCartney, Randy Newman, Sheryl Crow, Soul Coughing, Tim Finn, Phantom Planet, Bonnie Raitt, Pat McLaughlin, Tasmin Archer, The Corrs, The Ditty Bops, The Bangles, Indigo Girls, Ron Sexsmith, Daniel Powter, and Nerina Pallot.
He married Vonda Shepard in 2004. They had their first child, Jack Froom, (named for Froom's late father, a noted physician and educator), on 15 April 2006.