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.
who played bert on the big bang theory
Brian Edmund Posehn