SIPTU members will stage a one-day strike this Friday at the Western Alzheimers respite centre in Ballindine.
The Marion House facility is one of 13 nationwide that are facing a 24-hour work stoppage on Friday, as part of the campaign to restore full wages to those involved in Section 39 organisations.
Galway Rape Crisis Centre will also be impacted by the strike.
Section 39 organisations, which are funded by the HSE, has cuts imposed during the recession, in line with the public service sector.
However, while the public sector have since enjoyed pay rises, Section 39 workers -working in areas such as home care, dementia, and alzheimers services - have not seen their pay restored.
Last April, a deal was brokered at the WRC to restore pay for Section 39 workers, but SIPTU says this has failed to materialise, which has led to Friday's industrial action.