Senior Commissioning Manager

Costain Group PLC

Senior Commissioning Manager with Costain managing water project commissioning activities for the AMP cycle. Overseeing the planning and execution of commissioning across diverse water and wastewater projects.

Posted 6/11/2026full-timeWigan • 🇬🇧 United KingdomSeniorWebsite

About the role

Key responsibilities & impact

Lead and manage commissioning activities across multiple water projects
Develop and implement commissioning strategies, plans, and procedures
Coordinate with design, construction, and operations teams to ensure smooth system integration
Oversee testing, inspection, and validation of mechanical, electrical, instrumentation, and control systems (MEICA)
Ensure compliance with health, safety, environmental, and regulatory standards
Manage risk assessments, method statements, and commissioning documentation
Provide technical leadership and guidance to commissioning engineers and site teams
Liaise with client, stakeholders, and regulatory bodies throughout the commissioning process
Champion high quality delivery from the outset of design; developing processes, systems and initiatives to drive a high quality, right first-time culture
Monitor project timelines, budgets, and resources related to commissioning activities
Provide accurate and timely project performance reports, ensuring projects are on track and contract requirements are met; sharing and celebrating success and developing improvement plans and implementing mitigation strategies as required
Lead troubleshooting, fault-finding, and performance optimisation
Support handover processes, including training and documentation for operations teams

Requirements

What you’ll need

Degree/equivalent in Engineering (Mechanical, Electrical, Chemical, or related discipline)
Extensive experience in commissioning within the water / wastewater sector
Strong knowledge of water treatment processes (e.g., filtration, pumping, disinfection, sludge treatment)
Proven leadership experience managing multidisciplinary teams
Experience with MEICA systems and process control (SCADA/PLC)
In-depth understanding of health, safety, and environmental regulations
Strong project management and stakeholder engagement skills
Ability to manage multiple projects and priorities simultaneously
Chartered Engineer status (or working towards it)
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
Leadership and team management
Problem-solving and analytical thinking
Communication and stakeholder management
Attention to detail and quality assurance
Decision-making under pressure

Benefits

Comp & perks

Costain appreciate the time and effort taken when applying for one of our positions but, due to the high volume of responses, we are unable to provide individual feedback on candidates at application phase.
We do share individual feedback following an interview.
A Disability Confident employer will generally offer an interview to any applicant that disclose they have a disability and meets the minimum criteria for the job as defined by the employer.
It is important to note that in certain recruitment situations such as high-volume, seasonal and high-peak times, the employer may wish to limit the overall numbers of interviews offered to both disabled people and non-disabled people.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

commissioningwater treatment processesMEICA systemsprocess controlSCADAPLCrisk assessmentsfault-findingperformance optimisationproject performance reporting

Soft Skills

leadershipteam managementproblem-solvinganalytical thinkingcommunicationstakeholder managementattention to detailquality assurancedecision-makingproject management

Certifications

Chartered Engineer status