In 1986, while attending Rutgers University in New Brunswick, New Jersey, he met fellow schoolmate and drummer Scott Byrne and through a love of similar music, they started the rock band Instant Death in 1991.

Dreiwitz is also a member of Joe Russo's Almost Dead, The Dean Ween Group and the Led Zeppelin instrumental tribute band, Bustle in Your Hedgerow.

Crescent Moon drummers have included Claude Coleman of Ween, Tomato from the Sound of Urchin, Eric Slick of Dr. Dog and Joe Russo of Furthur.

Dreiwitz has also performed with the Moistboyz, The Marco Benevento Trio, The Gene Ween Band, Andrew Weiss, Mark Mulcahy, Russell Batiste, Billy Martin, Johnny Vidacovich, Lunar Bear Ensemble with John Lunar Richey, John Kruth, Peter Stampfel of The Holy Modal Rounders, Fishermen's Stew, Brook Benton, Hal Willner, Sam Shepard, John S. Hall, King Missile (Dog Fly Religion), Jack Petruzzelli, Greg Di Gesu, Robert Musso Trio, Clem Snide, Joan Osborne and Sparklehorse.

Dreiwitz has played bass every year in the core band for The Complete Last Waltz annual rock concert performance since the inaugural show in 2012.