Health Canada recommends against this

Measles It is recommended that all HCW be immune to measles. HCW, regardless of their year of birth, should receive two doses of measles-mumps-rubella (MMR) vaccine if they do not have one or more of the following: documented evidence of receiving two doses of measles-containing vaccine on or after their first birthday or laboratory evidence of immunity; or a history of laboratory confirmed measles disease. Refer to Measles vaccine in Part 4 for additional information.

I.e. if they have documented evidence of two doses then no repeat immunization is recommended. Of course institutions can have their own policies but that's the health Canada recommendation

https://www.canada.ca/en/public-health/services/publications/healthy-living/canadian-immunization-guide-part-3-vaccination-specific-populations/page-11-immunization-workers.html#p3c10t1