Chief Jacob "Mac" Dickinson serves as the Police Chief of the City of Harahan since his swearing in to office on January 1, 2011. Dickinson graduated from Southeastern Louisiana University with a B.S. degree in Criminal Justice. He began his law enforcement career as a Lafayette Police Officer in 1994 and shortly thereafter was hired by the Louisiana State Police. During his 17-year tenure with LSP, Dickinson served as a Road Trooper, Detective, SWAT Officer and a supervisor with Governor Jindal's Protection Detail. He retired as a master trooper having earned numerous awards including Life Saving, Meritorious Service, and was selected as one of the top investigators in the nation by Parade Magazine and the International Association of Chiefs of Police. Dickinson is a certified POST/FBI instructor, a firearm and driving instructor for the Federal Law Enforcement Training Center (FLETC), and as an instructor for the Department of State and BFFOC.

After the 9/11 attacks, Dickinson graduated from FLETC with distinction, and served as a Federal Air Marshal.

Dickinson was appointed by Governor Jindal to serve as the Chair of the Law Enforcement Executive Management Institute, LCLE and POST.

Mac is married to Judge Rebecca Olivier and they have two children: Jake and Delaney.