Prior to being elected to city council, Brockington worked for 16 years at Statistics Canada.[4] He spent a number of years in the Education Division, managing a national education survey and publishing both pan-Canadian data and research papers on the same subject. Later in his career, he took on two publications related to international travel statistics.
In addition to his work at Statistics Canada, Brockington was also on the board of the Canadian Association of Professional Employees, serving for two years as national vice-president and three years as chair of the finance committee.
From 2003 to 2010, Brockington served River Ward for two terms as the public school board trustee. During that time, he served in several capacities including Chair of the Business Services Committee, Budget Committee, and Vice-Chair of the Board.[3] In 2009, School Board Trustees from across Ontario elected Brockington the Vice-President of the Ontario Public School Boards Association.[5]
Brockington was first elected to city council in October 2014, and was re-elected in 2018 and 2022.
During his third tenure, Brockington serves on the Planning & Housing Committee, Environment Committee, Transit Commission, Finance and Corporate Services Committee and on the Board of the Association of Municipalities of Ontario (AMO).
Brockington is considered a moderate on City Council, fiscally conservative, yet often championing social causes that reflects his diverse, urban ward.[citation needed]