Jeff Sipe (born January 31, 1959), also known as Apt. Q258, is an American drummer. He is a rock and jazz fusion drummer but is proficient in other styles. He is a founding member of Aquarium Rescue Unit with Bruce Hampton. He was a member of Leftover Salmon and the Zambiland Orchestra, an experimental big band with members of Phish and Widespread Panic. He has toured with Trey Anastasio, Jeff Coffin, Jimmy Herring, Warren Haynes, and Keller Williams.