Brad Sandefur
Libertarian · IL · Cook County Sheriff's Office employee and 2026 Libertarian nominee for Cook County Sheriff
Brad Sandefur is the 2026 Libertarian nominee for Cook County Sheriff and has worked for the Sheriff's Office since 1990. His experience includes correctional, police, tactical, investigative, training, supervisory, and shift-command roles. A former Marine Corps military police officer, he holds a master's degree in criminal justice with a forensic-psychology concentration.
Track record
Public Safety and Crime Control
· 4 records
Brad Sandefur has served in the Cook County Sheriff's Office since 1990, working in corrections, sheriff's policing, tactical operations, investigations, and training.
August 18, 2025For
Source: lp.org · researched July 13, 2026
Sandefur completed 29 years in supervisory law-enforcement roles, including 17 years as a shift commander in the Cook County Sheriff's Office.
August 18, 2025For
Source: lp.org · researched July 13, 2026
Sandefur has worked as a law-enforcement instructor and trainer in addition to operational and supervisory roles at the Cook County Sheriff's Office.
August 18, 2025For
Source: lp.org · researched July 13, 2026
Sandefur served as a military police officer in the United States Marine Corps before his Cook County law-enforcement career.
August 18, 2025For
Source: lp.org · researched July 13, 2026
Elections
- Cook County Sheriff · November 3, 2026 · Cook County, Illinois
Profile last researched July 13, 2026.