GlaxoSmithKline has announced it is to maintain operations at the Stiefel plant in Sligo, which had been scheduled to close next year.
Sixty jobs will be lost over the next two years, but 50 new roles will be filled as the company transitions.
GSK is to spend €10m on the plant which currently employs 180 people, upgrading technical expertise and capacity there.
The company says it is making the move, following an in-depth strategic review and taking the flexibility, productivity and commitment of GSK staff in Sligo into consideration.
Staff were informed of the development at a meeting on site early this morning.
GSK employs 1,600 staff across five locations in Ireland.