Billy Graziadei, owner of recording studio Firewater Studios in Los Angeles, California, current lead vocalist of American rock band Biohazard and former lead vocalist for American rock band Suicide City
In December 2005, Graziadei and Evan Seinfeld performed Biohazard's "Punishment" with Dino Cazares of Fear Factory, Andreas Kisser of Sepultura, Adam Duce of Machine Head and Joey Jordison of Slipknot.
Son of Political Economist Antonio Graziadei and founder of the International Law office Studio Avv Ercole Graziadei.
Graziadei guest-starred in number of television series, including NCIS, Criminal Minds, 90210, Castle, CSI: Crime Scene Investigation, and Agents of S.H.I.E.L.D..