In the late 1980s and early 1990s, Sardy was active as a singer, songwriter and guitarist (most notably with his group Barkmarket), but since the mid-1990s, he has been more active as a producer, writer and/or mixer. He has worked with an eclectic mix of rock, punk, alternative, electronic and industrial rock but mainly song driven performers; critics have called him a "Hardcore super-producer."
1990 saw some of Sardy's earliest recording credits: as a guitarist on Marc Ribot's Rootless Cosmopolitans (his name was misspelled "Sardi") and on Barkmarket's Vegas Throat, the record that brought the group wider acclaim after a string of independent releases starting from 1987 with Barkmarket's 1-800 GOD-HOUSE and The Easy Listening Record. He also played guitar on Frank Black's 1993 solo debut.
Barkmarket was active from about 1987 to 1996 and toured widely. In addition to being the group's singer, songwriter and guitarist, Sardy also produced, recorded and mixed all their albums. This probably helped his nascent career as a producer: though often loud and aggressive, Barkmarket's albums are full of interesting sounds, textures and recording techniques.
Sardy recently scored the Columbia Pictures movie 21.
He has also contributed music for the soundtracks of Flushed Away, Spiderman and Spiderman 2, Surfs Up, Goal, Big Daddy, South Park, Monster House, TMNT, 21, Open Season and Private Parts.
In 2006, Sardy won 6 ARIA awards for his work with Jet; he also received 3 Grammy Awards (for OK GO, Wolfmother and Marilyn Manson) and Brit Awards for Oasis, Marilyn Manson and Wolfmother.