Pressure Tester in London

We are specialists in clean water and asset management, working in close partnership with our clients to plan, manage, and optimise water infrastructure projects. Our end‑to‑end services span investigation, verification, commissioning, leakage detection, and water quality support, ensuring reliable and efficient outcomes at every stage.

Part of the Celnor Group, a UK-based environmental services group operating across the Testing, Inspection, Certification and Compliance (TICC) landscape. With a growing portfolio of specialist businesses, Celnor provides essential services that protect people, property and the environment.

We are seeking a field based Commissioning Specialist to deliver end‑to‑end commissioning works on clean water mains from 80mm to 1000mm. Working closely with the Field Supervisor and Project Manager, the role ensures safe, compliant, and efficient project delivery, acting as the key on‑site point of contact.

• Ensure full compliance with company, client, and industry HSE, safety, and environmental standards.
• Deliver commissioning activities including pressure testing, swabbing, flushing, chlorination, dechlorination, and asset commissioning.
• Conduct pre‑site, live, and post‑site surveys, inspections, and briefings to ensure safe and compliant delivery.
• Liaise with internal teams, clients, contractors, and suppliers to maintain clear and effective communication.
• Monitor and analyse dosing equipment performance, including flow, pressure, turbidity, and chlorine levels, to ensure compliance.
• Identify, troubleshoot, and raise commissioning issues to protect water quality, end users, and the network.
• Maintain accurate records, manage equipment, support alternative workstreams when required, and mentor technicians, with flexibility for occasional extended or short‑notice shifts.

• Experience in a commissioning role, with exposure to pressure testing, chlorination, and dechlorination (training provided where required).
• Relevant industry certifications such as EUSR Water Hygiene, SHEA Water, Hydrostatic Pressure Testing, NRSWA, Confined Space, and CSCS/SSSTS/SMSTS.
• Strong practical industry knowledge with the ability to brief RAMS and uphold the highest safety and compliance standards.
• Competent in IT systems including GIS mapping tools, PDA/Tablet use, and online reporting software.
• Proven ability to take ownership of tasks, coordinate resources, lead activities on site, and drive work through to completion.
• Experience in valve operations (including CALM Networks) and effective collaboration across field and office teams.
• Full UK driving licence and flexibility to work days, nights, and weekends in line with operational requirements.

You’ll be joining a business where your contribution matters and where professionalism, integrity and teamwork are genuinely valued. As part of the wider Celnor Group, you’ll benefit from group‑wide investment, shared expertise and opportunities to develop your career as the organisation continues to grow.

• 24 days annual leave plus bank holidays
• Benenden Health & Lifestyle rewards scheme: private healthcare, 24/7 GP and retail discounts
• Extra holiday days for long service (up to +30 days)
• Pension contributions above statutory minimum
• Support for professional development: funding for qualifications and memberships
• Twice‑annual salary reviews and performance appraisals

All offers are subject to DBS checks and Drug & Alcohol Testing.

Celnor Group and its businesses manage recruitment directly. We do not require agency support for this role and will only engage with recruitment partners from our preferred supplier list where necessary.

We may use technology, including AI‑enabled tools, to support parts of the recruitment process. AI is not used for candidate screening, scoring or hiring decisions. All hiring decisions are made by people, for people. Our recruitment systems are ISO 42001 accredited, reflecting our commitment to ethical, transparent and responsible use of technology.