The Maritime Union of Australia (MUA) said it had reached a breakthrough with the country’s largest container terminal operator that would deliver a new workplace agreement by the end of September.

The deal would end a long-running industrial dispute across container terminals in Sydney, Brisbane, Melbourne and Fremantle operated by the Australian unit of Dubai giant DP World.

The union said on Friday that DP World Australia has notified workers that it anticipates finalising workplace agreements with the union by 30 September.