Steve Di Giorgio (born November 7, 1967) is an American bass guitarist. He is known for his work with numerous heavy metal bands such as Sadus (of which he was a co-founder), Death, Testament, Megadeth, Sebastian Bach, Iced Earth, Autopsy, Obituary, Control Denied, Dragonlord and Charred Walls of the Damned, and he has performed on over 50 albums as a guest, session or full-time band musician.