More than 50 behind-the-scenes specialists who keep six Illinois hospitals running are poised to walk off the job in early July, after their union delivered a 10-day strike notice. The International Union of Operating Engineers Local 399, which represents building engineers, maintenance technicians and chief engineers at Prime Healthcare facilities, says its members handle HVAC, plumbing and other core systems that keep hospital units functional. Union leaders say they would rather ink a deal than hit the picket line but insist they are ready to strike if talks fall apart.
Local 399 says the bargaining unit covers 53 workers across the Prime system, and that a strike could begin as soon as July 2, with picketing expected on July 3. The union traces the conflict to Prime’s March 2025 purchase of several Ascension hospitals, saying members had to reapply for their own jobs and saw years of seniority protections wiped out. Union officials have filed multiple unfair labor practice charges accusing Prime and contractor MedSpace Services of failing to bargain in good faith, while MedSpace maintains it has negotiated fairly, has plans in place to keep operations running and does not expect any impact on patient care, according to NBC Chicago.
The bargaining unit and related legal filings cover a cluster of hospitals across the Chicago region, including Resurrection Medical Center and Saint Mary of Nazareth in the city. The petitions also list Saint Francis in Evanston, Holy Family Medical Center in Des Plaines, Mercy Medical Center in Aurora and St. Mary’s Hospital in Kankakee, according to filings with the NLRB.
What Workers Want
Union members say their wish list is short: restore lost seniority rights, bring back a clear wage scale and secure roughly a 3% pay increase to keep up with inflation. Local 399 project manager Mia Korinke described the demands as modest and largely focused on preserving what workers had already earned. "They're not asking for the moon," she said, according to NBC Chicago.
Broader Labor Context
The maintenance standoff is unfolding alongside other labor flare-ups inside the Prime system. Nurses and other staff at some of the same hospitals have pushed back since the acquisition, arguing that working conditions and job security have taken a hit. At Saint Mary of Nazareth, nurses held a one-day strike in June after several clinicians were fired during a union drive, a clash that has added more heat to contract talks across the network, as reported by the Chicago Sun-Times.
Legal Filings And What's Next
Local 399 has lodged unfair labor practice complaints and asked the NLRB to investigate what it calls bad-faith bargaining by management. If a strike moves forward, federal labor rules along with hospital contingency plans would govern how essential staffing is maintained and how operations continue, and the NLRB docket details the agency’s review of the dispute, according to NLRB records.
Union officials say they are still hoping for a last-minute agreement at the bargaining table, while hospital leaders insist backup plans are ready if workers walk. With the July notice period winding down, negotiations remain active and both sides publicly say they are willing to keep talking.
