[1] Answering an ad in the Village Voice,[1] he became a member of The Feelies in 1978, playing drums on their critically acclaimed debut album Crazy Rhythms.

[5] and played with bassist Jack Bruce and Japanese guitarist Kenji Suzuki on the 1987 album Inazuma Super Session – "Absolute Live!!"

Fier also contributed to records from the Electric Eels, Yoko Ono, Mick Jagger, Material, Herbie Hancock, Gil Scott-Heron, Peter Blegvad, Matthew Sweet, Stina Nordenstam, Lloyd Cole, Los Lobos, David Cunningham, Joe Henry, Afrika Bambaataa, and Jeff Buckley.

[8] Syd Straw, a member of the Golden Palominos, posted on Facebook on October 11, 2019, that Fier was no longer playing drums.

[10][11][12][13] According to Exit International director Philip Nitschke, Fier was not suffering from terminal illness, but "wanted to die on his own terms after feeling he had accomplished everything he could in life.

Fier's friends reported the musician had money troubles and injuries which hampered his drumming, and had discussed the possibility of ending his life for several years.