Biohazard is a hardcore punk/heavy metal band originally based in Brooklyn, New York. They are acknowledged as one of the earliest bands to fuse hardcore punk and heavy metal with elements of hip hop. The earliest lineup consisted of bassist/vocalist Evan Seinfeld, guitarist Bobby Hambel, and drummer Anthony Meo. Guitarist/vocalist Billy Graziadei would join the band soon after, changing the band to a four-piece. Since January 2012, the lineup has consisted of Billy Graziadei, Bobby Hambel, Danny Schuler, and Scott Roberts.