David Sirmon was a senior linebacker for the 1995 Montana Grizzlies and finished his final season at UM as the team's third-leading tackler. He piled up 65 tackles, a sack and two tackles for loss to go with a pair of pass break ups and one near interception that led to a pivotal safety in Montana's 22-20 win over Marshall in the 1995 Division I-AA National Championship game.

David's nephew, Cy, was an All-Big Sky offensive lineman for the 2019 Grizzlies. His other nephew, Camden, was the quarterback on Missoula Sentinel's 2020 Class AA state title team. David's son, Jacob, was a 4-star quarterback recruit who started his career at Washington and is now at Central Michigan. David is a professor at the University of Washington.