Commissioning Engineer

Costain have won extensive work across the water sector to support the AMP 8 investment cycle.

We have been appointed by United Utilities as one of 7 partners to the Enterprise, delivering £5.5bn of projects in the Asset Management Period 8 (AMP8) between 2025 – 2030, and AMP 9 (2030 – 2035). Our scope is to provide project management, design, construction and commissioning services on design and build schemes throughout the North West and Cumbria region covered by United Utilities. Projects vary in value covering both infrastructure and non-infrastructure assets on water and wastewater sites with wider Enterprise partners

The Commissioning Engineer will be responsible for planning, coordinating and delivering commissioning activities across water and wastewater treatment assets, ensuring systems are safely commissioned, tested and handed over to the client in accordance with project requirements, specifications and regulatory standards.

Working closely with project delivery, design, construction, MEICA and client teams, you will play a key role in taking projects from construction completion through testing, commissioning and operational handover.

• Develop and deliver project-specific commissioning plans, programmes and strategies
• Lead commissioning activities from mechanical completion through to final handover
• Coordinate commissioning activities across MEICA, process, electrical, mechanical and civil interfaces
• Review designs, specifications, drawings and commissioning requirements to ensure they are deliverable
• Develop and manage commissioning schedules, test plans, inspection and test records
• Work closely with construction and engineering teams to ensure systems are ready for commissioning
• Identify commissioning constraints, risks and interfaces and develop appropriate mitigation plans
• Coordinate with water company clients, operational teams, subcontractors, suppliers and specialist commissioning partners
• Ensure commissioning activities are undertaken safely and in accordance with relevant legislation, standards and project procedures
• Support the resolution of technical issues identified during testing and commissioning
• Maintain accurate commissioning documentation, records and evidence
• Support the preparation of operation and maintenance information and final handover documentation
• Promote a strong right-first-time approach to commissioning and handover.

Knowledge, Skills, and Experience

• Previous experience in commissioning preferably within the water / wastewater sector
• Good knowledge of water treatment processes (e.g., filtration, pumping, disinfection, sludge treatment)
• Experience with MEICA systems and process control (SCADA/PLC)
• In-depth understanding of health, safety, and environmental regulations
• Strong stakeholder engagement skills
• Ability to manage multiple projects and priorities simultaneously
• Experience on large-scale infrastructure or utility projects
• Familiarity with UK water industry standards (e.g. AMP programmes)
• Knowledge of commissioning digital tools and data-driven performance monitoring

• Degree/equivalent in Engineering (Mechanical, Electrical, Chemical, or related discipline)
• Chartered Engineer status (or working towards it)

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