The Unite trade union has vowed to continue its fight for recognition at Seagate as job loss fears continue to hang over workers at the Derry site.
Speculation has been mounting in recent days on how the hard-disk manufacturer's "restructuring" plan will impact the factory where over 1,000 workers are employed in Derry.
Unite, meanwhile, have been seeking official recognition following a "member-led" organising campaign over the past six months at the site in the Springtown area of the city.