Leprino Cheese made the announcement yesterday.
SIPTU is meeting senior management at Leprino Foods in Portlaoise today.
This comes following what the union is calling the company's "shocking" and "regrettable" decision to end production by 2026.
The closure of the state-of-the-art facility, which employs 130 workers, will result in job losses across the Midlands region.
Union officials aim to explore alternatives to job losses and reduce the impact on employees and their families.
The Portlaoise plant began operations just five years ago.
Job losses from the closure of a Laois cheese factory could be minimised through other business expansions in the Midlands.
CEO of the Laois Chamber Alliance Jackie Carroll says they'll help affected employees identify opportunites:
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