Rainham, Zenith and TEi have announced they are joining Coriant, a newly established UK-based industrial and infrastructure maintenance services group.
The launch of Coriant follows the acquisition of Rainham by global private equity firm H.I.G. Capital in 2024, and the subsequent addition of Zenith and TEi to create a group of specialist industrial services businesses.
Coriant has been formed in response to changing conditions across the UK’s industrial and infrastructure sectors. Asset owners are facing pressures linked to the energy transition, ageing plant, rising safety and regulatory requirements, skills shortages, and the need to extend asset life. Against this backdrop, customers are increasingly seeking fewer, more accountable partners with the capability to deliver specialist services at scale.
The three businesses will continue to operate independently in their respective markets. Their brands, management teams, technical expertise and customer relationships will be retained. Coriant will act as a group-level platform to support growth, investment and closer alignment across the businesses.
The group’s strategy is focused on the maintenance, repair and optimisation of critical industrial and infrastructure assets. This includes investment in specialist capability, systems and people, enabling collaboration across operating companies to meet complex, multi-disciplinary customer requirements, and pursuing a selective buy-and-build strategy to add further specialist businesses.
Coriant aims to combine operational agility at company level with the scale and financial resilience of a larger group structure. The existing management teams at Rainham, Zenith and TEi will remain in place and will continue as shareholders, supported by a central leadership team within the group.
Tom Walsh, Chairman of Coriant, said the launch reflected a shift in how industrial services are being delivered in the UK.
“This launch recognises the changing nature of the UK industrial services market and marks an important milestone in the evolution of these businesses,” he said. “Coriant brings together our shared strengths and promotes deeper collaboration, while preserving the distinct identities that make Rainham, Zenith and TEi unique.”
He added that the group structure would allow the businesses to continue delivering specialist, responsive services, while benefiting from greater investment capacity and scale. Coriant also plans to extend its service offering through further acquisitions as part of its long-term growth strategy.
Coriant will operate across a range of industrial and infrastructure sectors, providing installation, maintenance, refurbishment and decommissioning services across the full asset lifecycle, with safety positioned as a central priority.
