Brian Posehn
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Brian Edmund Posehn (born July 6, 1966) is an American actor, voice actor, musician, writer, and comedian, known for his roles as Jim Kuback on The WB's Mission Hill and Brian Spukowski on Comedy Central's The Sarah Silverman Program. He also has a recurring role on The Big Bang Theory as geologist Bert Kibbler.

Posehn was born and raised in Sacramento, California. He is of German and Irish descent. He graduated from Sonoma Valley High School in 1984. He attended college at California State University, Sacramento.

Posehn began with guest appearances and mainly small roles in TV shows. He was on 28 episodes of Mr. Show with Bob and David (1995–1998), a sketch comedy series on HBO. In a 1996 episode of Friends, he delivered the manuscript in which Joey Tribbiani's soap opera character "Dr. Drake Ramoray" is killed off. He appeared as two different characters in NewsRadio: a fan with questions for Jimmy James at a book reading (1997), and a member of Dave's a cappella group "Chock Full o' Notes" (1998). In the Seinfeld episode "The Burning" (1998), he played a patient, when Kramer "was given" gonorrhea. His character was instructed to "act out" to a group of medical students how a surgeon left a sponge in him post surgery. Posehn also wrote the Space Ghost: Coast to Coast episode "Cahill" (1998) with Ben Karlin. He appeared on 29 episodes of the NBC series Just Shoot Me! (1999–2003). He played the voice of Jim in Mission Hill on the WB (1999–2002), and Del Swanson in 3 South on MTV (2002–2003). On an Adult Swim production, Aqua Teen Hunger Force, he voiced the Wisdom Cube in the 2003 episode "The Cubing".