SIPTU says the announcement of the closure of Viatris in Little Island came completely out of the blue.
200 people will lose their jobs when the pharmaceutical company shuts down its site in 2028.
Union representatives have written to management to discuss the planned closure.
Speaking to RedFM news, Ciara McMahon-Flavin from SIPTU says jobs need to be retained at Viatris:
"This totally came out of the blue to the union. So our role now is to get into management, we've asked for an urgent meeting to discuss the future of the site. Our goal will be to try and retain as many good unionized jobs as possible. On this site, people that have worked there, have worked there for decades. They've given loyal service to this site."