The semi-state company had said staff wouldn't be affected by today's announcement.
SIPTU is disputing Bord na Móna's claim that today's announcement does not affect workers on the ground.
The semi-state says it's abandoning peat harvesting permanently, in favour of green alternatives.
But SIPTU's Energy Organiser Willie Noone believes this formal announcement is being used to deflect from almost 100 job losses.
He says, according to Bord na Móna, the staff are being laid off in line with normal seasonal arrangements.
But Mr. Noone claims there is work available and the company is treating its workers appallingly:
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