Deputy Chief Treena MacSween began her policing career in
1998 with Peel Regional Police before joining the Hamilton Police
Service in 2001. In April 2024, she was appointed Deputy Chief of
the London Police Service, bringing more than 27 years of
experience in operational, investigative, and administrative
leadership.

An accomplished Critical Incident Commander and Public Order
Unit Commander, Deputy Chief MacSween has led numerous
large-scale operations for major events and critical incidents. She
is deeply committed to building collaborative partnerships that
shape effective community safety strategies and is a steadfast
advocate for inclusive workplaces and the wellness of police
service members.

Recognized as a trailblazer in Canadian policing, her promotion to
Deputy Chief marked a historic milestone, making her the highest-
ranking Black female officer in Canada.
Beyond her operational responsibilities, she serves as Co-Chair
of the Canadian Association of Chiefs of Police Equity, Diversity,
and Inclusion Committee and is an active member of the Ontario
Women in Law Enforcement Advisory Council.

​Deputy Chief MacSween is also a proud mother to two daughters,
Taylor and Alexis, and shares a strong commitment to public
service with her husband, Mike, a firefighter.