In 1993, Sheridan was promoted to the rank of Captain and was assigned to the third district in the northwestern part of Maricopa County, which includes the communities of
Sun City,
Sun City West and
Wickenburg. The next year he was moved to District 4, which contains the northeastern part of the county. Several years later, he was promoted to Chief of Patrol by Sheriff
Joe Arpaio, and later Chief of Custody. In 2010, Sheriff Arpaio appointed Sheridan as his Chief Deputy. While working for Arpaio, Sheridan was found in civil contempt of court in connection with the Melendres racial profiling lawsuit. Sheridan has said that his sheriff's department has eliminated racial bias that characterized the department under his predecessor, Joe Arpaio. However, a 2026 review by ProPublica showed continued disparities affecting Latino drivers under Sheridan's tenure. ==References==