Currently Inspector General for the Arizona Department of Economic Security, he retired in 2017 as Chief of Police in Mesa after a 30-year career. While with Mesa PD, he was lead developer of the "Mesa Police Department's Response to the President's Task Force on 21st Century Policing" report and was instrumental in the implementation of notable Mesa PD innovative programs, particularly the CompStat approach to data-driven policing. The Mesa model of CompStat quickly became a model for other police departments throughout the state of Arizona and has been credited as a key aspect of reducing crime in Mesa.

John is currently Board President of the Arizona Anti-Trafficking Network, Board President of Community Bridges INC., Fiesta Bowl, Yellow Jacket Committee Member, secretary for the Tempe Coalition to reduce underage drinking and drug abuse, and Board Member of Mesa MARC Center.

An adjunct instructor at Maricopa Community Colleges for 20 years and currently teaching justice studies at Mesa Community College, his many honors and awards include the MCC Phi Theta Kappa Honor Society 2013 Mentor of the Year, 2016 Maricopa Community Colleges College Hero Leadership Award, 2017 Arizona Gang Investigators' Association Lifetime Achievement Award and 2016 East Valley NAACP Judicial Equality and Law Enforcement Leadership Award.

For a link to the full video of the ceremony, please visit MCC Hall of Fame 2019.