A number of Brock University employees are represented under a total of nine collective agreements between the University and various union locals. A list of these union locals, sorted by the collective agreement (CA) expiry date, is provided below.
| Union Local | Bargaining Unit Description | CA Expiry |
| CUPE 1295 FT | Maintenance, trades and custodial | April 30, 2025 |
| CUPE 1295 (student) | Maintenance, trades and custodial | April 30, 2025 |
| CUPE 4207-2 | ESL Coordinators | June 30, 2025 |
| CUPE 4207-1 | Part-time Instructors, TAs, Course Coordinators, Marker-Graders & Lab Demonstrators | September 6, 2025 |
| IATSE | Theatre technicians, head of wardrobe, technical director, theatre technical production assistant, production runners, stagehands, wardrobe assistants | June 5, 2026 |
| BUFA | Faculty and professional librarians | June 30, 2026 |
| CUPE 4207-3 | ESL Instructors | July 6, 2026 |
| CUPE 4207-4 | Clinical Nursing Instructors | February 5, 2026 |
| OSSTF | Support staff | April 30, 2024 |
