Brian Posehn

Brian Posehn is an American stand-up comedian, actor, voice actor, musician, and writer known for his work in television and comedy. He gained prominence with his first major recurring role on HBO's *Mr. Show with Bob and David* (1995–1998). Posehn later appeared as Jim Kuback on *Mission Hill* and as Brian Spukowski on *The Sarah Silverman Program*. He also had a recurring role as geologist Bert Kibbler on *The Big Bang Theory*.