Amec chief executive Peter Mason made the announcement at a seminar on the company's energy and infrastructure business.
Mason said that Amec remained focused on negotiated contracts and repeat business in the capital projects sector, where demand from oil and gas clients continued to be strong.
He said Amec's annual sales in energy-related business had reached £1bn and noted that the group occupied a leading position in the global market for services and engineering. He said: "We remain focused on our core strategy of generating shareholder value by transforming Amec into a global, service-driven enterprise with a strong base of predictable, recurring revenues from long term clients."
We are focused on our strategy of generating shareholder value
Peter Mason, Amec chief executive
The Amec joint venture, at Bellanaboy, will be responsible for engineering, procurement, construction, and commissioning.
Irish companies in the joint venture include civil engineers SIAC Construction and Irish Industrial Fabricators, the mechanical and electrical contractor.