Commissioning Engineer

Surrey & London (with site travel as required)
45 hours per week

Overview

We are seeking an experienced Commissioning Engineer to join a major main contractor delivering complex water and wastewater process engineering projects . This role is critical to ensuring safe, compliant, and right‑first‑time installation, testing, and commissioning from design through to handover.

You will play a leading role across the full commissioning lifecycle, working closely with design teams, suppliers, subcontractors, and client stakeholders to deliver high‑quality outcomes.

Key Responsibilities

Commissioning & Technical Delivery

• Provide full lifecycle commissioning input from design through installation, testing, commissioning, and handover.
• Develop and implement commissioning plans, procedures, and documentation.
• Undertake hands‑on commissioning activities across electrical, mechanical, and process systems.
• Lead and witness FAT and SAT activities, managing defect close‑out.
• Review and interpret electrical/mechanical schematics, FDS, P&IDs, and initiate design changes where required.
• Configure and calibrate analytical equipment and integrate with monitoring systems.
• Troubleshoot issues using structured, analytical problem‑solving techniques.
• Coordinate and supervise installation and commissioning activities, including third‑party engineers.
• Act as front‑line supervisor during installation and commissioning phases.
• Ensure quality, snag‑free installation and commissioning delivery.
• Verify equipment is FAT tested and snag‑free prior to site delivery.
• Ensure capture and documentation of installation, testing, and commissioning data.

Safety, Quality & Compliance

• Promote and implement SHEQ behavioural improvement initiatives.
• Review and approve RAMS for commissioning activities.
• Ensure compliance with standards, statutory legislation, ITPs, and safety rules.
• Apply best practice, technical bulletins, and lessons learned consistently.

Management, Reporting & Stakeholder Engagement

• Monitor supply chain performance against KPIs/KPMs and drive improvement.
• Contribute to and manage inputs to the overall project programme.
• Produce timely progress and status reports for senior management and the Core Management Team.
• Contribute to client reports and management briefings.
• Support Early Contractor Involvement (ECI) through site surveys and system reviews.
• Deliver training to client operations and maintenance teams.

Qualifications & Experience

• Experience working for a main contractor on water and wastewater process engineering projects .
• HNC / Degree in a relevant Engineering discipline or engineering apprenticeship with NVQ and multi‑discipline experience.
• Minimum 3 years' experience in a commissioning role within the water industry.
• Strong knowledge of electrical and mechanical installation and commissioning processes.
• ECS (CSCS) Card.
• SSSTS or SMSTS.
• BS th Edition.
• First Aid at Work.
• Professional registration and membership.
• Experience undertaking Electrical AP or Mechanical AP roles.

Personal Attributes

• Meticulous, structured, and organised.
• Pro‑active with a strong engineering focus.
• Approachable and confident when client‑facing.
• Able to self‑manage and lead site teams when required.
• Comfortable challenging designs and delivering value engineering solutions.

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