 Mazurek currently leads a number of ensembles, including Exploding Star Orchestra, Pharaoh and the Underground (featuring Pharoah Sanders), Chicago Underground, Pulsar Quartet, São Paulo Underground, Skull Sessions, Sound Is Quintet, Starlicker, Mandarin Movie, and Throne of the House of Good and Evil, each of which possesses its own distinct musical personality.He has collaborated with a wide variety of artists, such as Bill Dixon, Pharoah Sanders, Mike Ladd, Roscoe Mitchell, Yusef Lateef, Fred Anderson, Naná Vasconcelos, Mamelo Sound System, Alexandre Kassin, Marcelo Camelo, and others.As a composer, Mazurek has written over 300 original compositions over the past 30 years, and has released at least 55 recordings on various labels including Aesthetics, Cuneiform, Delmark, Family Vineyard, Mego, Northern Spy, Submarine, Thrill Jockey, and his own label Infinity Dogs.