The Curtain Group was established in Papua New Guinea in October 1966 with the commencement of operations by the company known as Curtain Bros Papua New Guinea Limited. The company was formed by three brothers: Dan, Mick and David Curtain. The brothers had travelled to Papua New Guinea for work with the Territory Administration. Not long after arriving in Port Moresby, they realised the potential for business opportunities and established their Curtain Bros business.

In the early days, Curtain Bros PNG was solely a civil engineering and construction company, focusing on roads, subdivisions and airstrips. 

The Curtain Bros PNG Head Office and operational base is on Motukea Island, some twelve kilometres from the Port Moresby Central Business District. Motukea Island is a 106 hectare commercial property of Curtain Bros that is under continuing development. Current operational facilities include steel fabrication, a dockyard (Papua New Guinea Dockyard, with a 5000 tonne capacity slipway), and residential facilities.