Three leading international engineering, procurement and construction contractors are gearing up to submit commercial bids to Abu Dhabi Marine Operating Company (Adma-Opco) for its Umm Shaif oil expansion project, valued at more than $500 million.

Abu Dhabi’s National Petroleum & Construction Company (NPCC), UK-listed Petrofac and US-based engineering giant McDermott are expected to submit commercial bids to Adma-Opco for the job, industry sources said.

Sources