The 11-year dispute stems from CNN's decision to replace a unionized subcontractor called Team Video Services, which provided the network with audio and video technicians, with an in-house nonunion work force in its Washington and New York bureaus.
The decision comes weeks after CNN's top boss Jeff Zucker hinted at additional job cuts at the Turner-owned news channel, which employs over 2,000 people.
"We are going to have to do what we do with less," he said in a memo to CNN employees. "As a result, that means there will be changes. No final decisions have been made."
It's unclear how the NLRB's ruling will impact the expected restructuring at the news operation.
The Labor Board found "overwhelming" evidence of anti-union animus in CNN's failure to bargain with the union about the decision to terminate the subcontracts. The org also found CNN had implemented a hiring plan designed to limit the number of discharged TVS employees to avoid a successorship bargaining obligation.