Brian Edmund Posehn is an American stand-up comedian, actor, voice actor, musician, and writer. After numerous appearances as a television guest star, Posehn acquired his first major recurring role in HBO's Mr. Show with Bob and David (1995–1998). He is known for his roles as Jim Kuback on The WB's Mission Hill and Brian Spukowski on Comedy Central's The Sarah Silverman Program. Posehn had a recurring role on The Big Bang Theory as geologist Bert Kibbler. As a stand-up comedian, Posehn has released four comedy albums and one standalone music album. He has hosted the online Dungeons & Dragons podcast Nerd Poker since 2012. He has also done voice work for video games such as Halo 2, FusionFall, Brütal Legend, and Minecraft: Story Mode. Posehn received nominations for two Primetime Emmy Awards in 1998 and 1999 for Outstanding Writing for a Variety or Music Program for his work on Mr. Show with Bob and David, which he shared with the series' writing crew. Posehn also received a nomination for a DVDX Award for Best Original Song in a DVD Premiere Movie in 2003 for Run Ronnie Run!