Kilkenny-based engineering firm Entegro is set to create 100 new jobs as it expands into the renewable energy sector. The company has acquired Monaghan-based ACEL Energy to form a new entity, Entegro Energy, aiming to scale its workforce to approximately 300 employees over the coming years.
The acquisition marks a strategic pivot for the Kilkenny-headquartered infrastructure firm. Entegro, which has traditionally focused on fibre telecommunications and network infrastructure, is moving to integrate renewable generation and storage solutions into its core business model. By forming the new entity, Entegro Energy, the company intends to provide end-to-end services ranging from design and engineering to the commissioning and long-term operation of power systems.
Strategic Expansion and Workforce Growth
The deal involves a significant scaling of Entegro’s personnel. Currently employing 200 people, the group plans to increase its headcount to closer to 300 over the next two to three years. This growth aligns with the company’s broader financial trajectory; according to recent reporting, Entegro’s revenue has grown to over €60 million, with management targeting a revenue milestone of €100 million in the coming years.
John Rooney, the group CEO of Entegro, emphasized that the move into energy is a natural evolution for a company already deeply embedded in critical infrastructure. Entegro has always sat at the heart of critical infrastructure, so moving into energy is a natural next step rather than a departure,
Rooney said.
Integrating ACEL Energy and Nahanagan Electrical
The acquisition of ACEL Energy brings specific expertise in solar PV, battery energy storage, and demand management to the Entegro group. ACEL Energy was founded in Monaghan in 2022 by Barry Sherry and Declan McDonald, both of whom will join Entegro to continue leading the business. The merger also complements Entegro’s existing strategic partnership with Nahanagan Electrical, a specialist in high- and medium-voltage engineering.

“Bringing ACEL and Nahanagan together gives us the ability to design, commission and run energy systems end to end, from an Irish base and with a trusted team that keeps growing. That is the future we want to help build, and to build well.”
John Rooney, Group CEO, Entegro
For the founders of ACEL Energy, the deal provides the resources necessary for larger projects. Declan McDonald and I built ACEL on engineering-led renewable generation and storage, and joining Entegro lets us do that at a scale we could not reach alone,
said Barry Sherry, Managing Director at ACEL Energy. He noted that the combined capabilities of the firms allow them to offer clients a single partner capable of managing projects from initial design through to long-term infrastructure maintenance.
Market Position and Future Outlook
Entegro’s expansion comes as it continues to function as a delivery partner for the National Broadband Ireland scheme. Having been established in Kilkenny in 2019, the company has grown into a multinational operation with a presence in the UK and the US. In 2024, Entegro became part of the Kyntus Group, a French infrastructure firm with global reach.
By leveraging its established telecommunications footprint and its new energy-focused division, Entegro aims to address the rising demand for multi-utility infrastructure. As Rooney stated in his announcement, the acquisition represents another milestone for Entegro as we continue to build a multi-utility business across telecoms, power and infrastructure to meet the demands of Ireland and beyond.
While the financial terms of the ACEL Energy acquisition remain undisclosed, the integration of these specialist capabilities appears to be a core component of Entegro’s strategy to reach its €100 million revenue target. The industry will now watch how the newly formed Entegro Energy entity executes its first major projects in the renewable generation and battery storage sectors.
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