The mine has been closed since last June.
Tara Mines is to reopen after agreement at the Workplace Relations Commission.
SIPTU says it will be releasing more details after it has spoken to its members.
The parent company Boliden announced the temporary closure of the facility last June, and resulted in the temporary lay-off of 650 workers.
It said the decision was due to the high energy prices, and the low price of zinc.
Michael O’Leary Rejects Rape Comment Criticism And Refuses To Apologise
Gardaí Investigating Graffiti Damage To Three Buildings In Laois
Irish Business Leaders Unite With Rory Best For 378km Charity Challenge
Midlands MEP To Host Youth Policy Dialogue On Future Of Farming
SETU Launches Collaboration With The All Ireland Institute Of Hospice And Palliative Care
Appeal Lodged Against Plans For 30 New Homes In Laois
€100k Funding Announced To Support Students At International STEM Events
Midlands MEP Calls For Major EU Housing Investment To Tackle Crisis