William Schneider (born June 17) is an American musician. He has played bass in the punk rock band Pinhead Gunpowder since 1990, as well as providing vocals and writing the lyrics to the song Backyard Flames. He has also been in many other bands such as The Influents, Monsula, Uranium 9 Volt, Sawhorse, The Skinflutes and The Coverups. Bill was worked as bass technician for Mike Dirnt, Green Day's and as guitar technician on their albums Nimrod and Warning and currently working as tour crew manager for Green Day. He also owned Broken Guitars, a guitar shop in Oakland, California with Billie Joe Armstrong. Bill still works on the sidelines with the band as well as in the studio.