Chief Paul MacMillan joined the MBTA Transit Police Department in November 1983. Chief MacMillan has served in numerous assignments in the Department, starting as a patrol officer. He was later assigned as a detective in the Investigative Services Division where he served for seven (7) years. In September 1990, he was promoted to the rank of Sergeant where he served as a rapid transit Patrol Supervisor. He also oversaw the Field Training Officer program. In 2002, he was assigned as the Commander of the Planning and Research Unit and remained in that capacity after his promotion in January 2004, to the rank of Lieutenant. As Commander of the Planning and Research Unit, then Lieutenant MacMillan oversaw the Department’s efforts for accreditation by the Commission on Accreditation for Law Enforcement Agencies (CALEA). In January of 2005, he was promoted to Deputy Chief of the Investigative Services Division.
Chief MacMillan received a B.S. in Criminal Justice from Northeastern University, a Graduate Certificate in Dispute Resolution from the University of Massachusetts, Boston and a M.A. Degree in Criminal Justice from Western New England College. He is also a graduate of the FBI National Academy.
On November 6, 2008, the MBTA Board of Directors appointed Deputy Chief Paul MacMillan as the Chief of the MBTA Transit Police Department. Chief MacMillan is the first MBTA Transit Police Officer to rise through the ranks to be Chief in the forty year history of the MBTA Transit Police Department.