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.Installation & Site Activities
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
Essential
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.
Water Hygiene Card.
SSSTS or SMSTS.
BS7671 18th Edition.
First Aid at Work.
Desirable
Professional registration and membership.
CompEx qualifications.
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.
Ready to take the next step in your career? Apply now and make your impact count!!
Please click to find out more about our Key Information Documents. Please note that the documents provided contain generic information. If we are successful in finding you an assignment, you will receive a Key Information Document which will be specific to the vendor set-up you have chosen and your placement.
To find out more about Progressive please visit
Progressive Recruitment, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC(phone number removed) England and Wales
Salary description
£500.00 - £500.00 per hour