Jackie Gordon became the first female Sergeant-at-Arms of the Legislative Assembly of Ontario in 2017, serving until 2022. Prior to this role, Ms. Gordon was with the Halton Police Service for 34 years, holding a variety of different positions including Inspector, and working in community policing and the court system.

The Sergeant-at-Arms is responsible for security in the House and the Legislative Precinct, as well as building operations and maintenance for the Legislative Building.