Energy Infrastructure & Water

The transition to renewable energy, electrification, increased network demand and the need for resilient infrastructure are reshaping how assets are designed, delivered and operated. Projects must be delivered safely, efficiently and often within live, highly regulated environments, while meeting growing expectations around sustainability, programme certainty and long-term performance. 

We work collaboratively with infrastructure owners, utilities providers and delivery partners to respond to these challenges. Our approach combines engineering expertise with digital coordination, offsite manufacturing and operational understanding, ensuring infrastructure is designed not only for construction, but for performance over decades of operation.

We work closely with utilities providers, infrastructure owners, contractors and end users to align engineering solutions with operational requirements, regulatory obligations and long-term performance objectives. Our teams bring deep technical expertise across HV infrastructure, utilities, complex MEP systems and operational environments, supported by a culture focused on safety, collaboration and continuous improvement. 

Our long-standing framework relationships with Distribution Network Operators (DNOs) and infrastructure owners reflect a delivery model built on trust, safety and operational performance across critical national infrastructure. From early-stage design through to commissioning, maintenance and renewal, we act as a trusted delivery partner focused on achieving safe, predictable and high-quality outcomes. 

We support critical power and utility networks through planned maintenance, emergency response and long-term asset management, helping infrastructure owners maintain resilience, compliance and operational continuity across regulated environments. 

Supported by regional delivery teams across the UK, we provide the responsiveness and technical expertise required to support nationally critical infrastructure safely and reliably. 

Engineering Solutions Group (ESG), part of the NG Bailey Group a specialist engineering group delivering critical infrastructure across the water, environmental, and wider infrastructure sectors.

At the core of ESG is ECS Engineering Services (ECS), its largest and most established business.

With more than 35 years of expertise, ECS delivers high-quality, reliable, and cost-effective engineering solutions. The business specialises in the bespoke design and construction of water, energy, and environmental processing and management projects that support essential infrastructure across the UK.

ECS works with a broad range of clients, including UK water utility companies, government agencies, internal drainage boards, construction firms, architects, and fabrication specialists - supporting projects of all sizes and complexity.

The business operates across four key divisions: Water Management, Water Treatment, Construction, and Power & Industrial.

From energy generation and utilities infrastructure to HV networks and electrification programmes, we bring the engineering expertise, specialist capability and delivery certainty to support critical infrastructure at every scale.