On Monday 22nd August, Promanex was acquired by Costain Limited, a Costain Group Company. Costain Limited is a leading UK engineering and construction company which has a portfolio spanning more than 140 years of technical excellence and a vision to be one of the UK’s top solutions providers. Promanex, part of the Costain Group, will continue to provide solutions to the UK’s biggest public and private sector organisations. Our people deliver a diverse range of support services, combining aspects of facilities management, mechanical engineering, civil engineering, and water compliance, largely to power generation, nuclear decommissioning, oil refining, and related sectors.