Galen Tyrol (commonly referred to as The Chief) is a character on the television series Battlestar Galactica. Tyrol is responsible for the maintenance of the Vipers and Raptors aboard Battlestar Galactica. After the events of the miniseries, he was the ship's highest-ranking non-commissioned officer at rank of Senior Chief Petty Officer.
Galen Tyrol is played by Aaron Douglas, who originally auditioned for the role of Lee Adama before that role went to English actor Jamie Bamber.
Read more about Galen Tyrol: Character History, Character Development