London, September 15th 2025 — TowerBrook today announced an investment in GMC Group (“GMC” or the “Company”), one of Ireland’s leading civil and mechanical engineering firms. This investment comes at a time of significant growth and expansion for GMC, as the company continues to secure and deliver large-scale public and private sector infrastructure projects across Ireland.

Founded over four decades ago, GMC has built long-standing partnerships with semi-state bodies and public agencies, positioning itself as a trusted, mission-critical partner for essential national infrastructure. The company delivers full turnkey solutions across seven core sectors: water, gas, power, telecoms, transportation, public sector and renewables. The Company plans to leverage TowerBrook’s partnership to scale its organization, accelerate its growth ambitions, and continue delivering high quality, critical infrastructure works that communities can rely on.

TowerBrook has a strong track record in the infrastructure services sector, having identified it as a core area of focus and demonstrated its capabilities through prior investments such as JSM in the UK and Langan in the US. Over the past several years, the firm has built deep expertise in multi-utility service models and industrial services, supported by an extensive network of industry experts. This experience, together with TowerBrook’s history of backing management teams to scale and grow, positions it as a suitably qualified partner to support GMC in its next phase of growth.

Following the conclusion of the deal, the management team at GMC, led by CEO Shane McCloskey, will remain the majority shareholders in the business and will continue to lead the company.

“This investment by TowerBrook marks an exciting new chapter for GMC Group,” said Shane McCloskey. “It provides us with the resources and strategic support we need to ensure that we continue to deliver projects across Ireland with the same reliability and excellence our customers have come to expect. Importantly, it will help accelerate our growth ambitions and ensure we remain a trusted partner for the delivery of critical infrastructure developments and services into the future.”

“We are delighted to announce our investment in GMC Group,” said Joseph Knoll, Managing Director, and Sumit Dheir, Senior Principal, TowerBrook Capital Partners. “We consider that GMC’s technical excellence, operational reliability, and its deep-rooted relationships with Ireland’s key infrastructure stakeholders make it an ideal partner. We look forward to supporting the team as GMC continues to scale its operations and deliver mission-critical services that benefit communities across the country.”

The transaction is subject to approval by the Competition and Consumer Protection Commission (CCPC).