Brien Casey became a Deputy in the Corrections Division of the Williamson County Sheriff’s Office in 2012. He was promoted to Sergeant in 2014, and he is currently Sergeant over Corrections Investigations. Brien holds Bachelors degrees in Political Science and History from Southwestern University in Georgetown, and has local roots, previously attending high school in Round Rock. He enjoys sports, is an avid hockey fan, and has been known to sport a kilt at local events.
Jason Waldon is a Sergeant with the Major Crimes Unit of the Williamson County Sheriff's Office Criminal Investigations Division, and was previously a Detective, FTO, and Deputy. Before that, he was a Patrol Corporal with the Palestine Police Department, where he was named PRIDE (Professional results in daily efforts) Patrolman in 2005. He has been in law enforcement since 2002, carries a Master Peace Officer license, and has a Bachelors of Science in Criminal Justice - Law Enforcement from Texas State University. He previously served as the Vice President of the WCDA from 2013 through 2017. In 2015, he was appointed Campaign Treasurer of the Williamson County Deputies Association PAC.
Mark Huntley is a Patrol Sergeant in the Williamson County Sheriff's Office, supervising a night shift. He was previously assigned to the Special Crimes Unit as a Detective, where he was specifically tasked with investigating crimes related to high technology. He began his law enforcement career in 2002 and has also previously served as a Patrol Deputy, and a Field Training Officer. Mark holds a Master Peace Officer License, is a certified instructor, and earned a Bachelor of Science Degree in Criminal Justice from Southwest Texas State University. He has previously served on the board of the WCDA as Sgt-At-Arms, and in 2015 he was chosen to serve as an Assistant Treasurer for the Williamson County Deputies Association PAC. Mark is a father of two sets of twins, and he enjoys watching his children participate in their sports of choice.