Nearly two dozen campus enforcement and patrol officers with Memorial University of Newfoundland, who provide service to Eastern Health, have been handed layoff notices.
The university confirmed for CBC News Tuesday that 18 permanent employees, three contractual workers and several on-call employees were issued notices this week.
There are 52 officers in total at MUN, in addition to four clerical staff.
Eastern Health announced last year that it would no longer need to use MUN's CEP officers at its facilities, including the Health Sciences Centre, and sent out a request for proposals.
The contract was awarded to successful bidder Paladin Security Services in October 2014.
Paladin touts itself as into one of the largest security companies in Canada, with offices right across the country.
"There has been a long-standing relationship between Memorial University and Eastern Health for shared security services at the Health Sciences Centre," a statement from the health authority said.
"Eastern Health thanks Memorial University for the security services it has provided over this time."
The safety of clients, patients and visitors is a priority during the transition between CEP officers and Paladin guards, Eastern Health said.
There is no word on why the relationship between MUN and Eastern Health has come to an end.
Paladin, which has a local office on Gleneyre Street in the east end of St. John's, is currently recruiting workers.
The switch in enforcement services will take place June 30.