Job Specification: Pre-Commissioning Water Treatment / Flushing Engineer
Job Title: Pre-Commissioning Water Treatment / Flushing Engineer
Location: Country Wide
Employment Type: Full-Time
Reports To: Commissioning Director / Project Manager
Job Overview:
We are seeking a skilled and experienced Pre-Commissioning Water Treatment / Flushing Engineer to carry out the pre-commission cleaning, chemical dosing, flushing, and water treatment of closed loop and open systems (CHW, LTHW, condenser, domestic water, etc.). This role ensures systems are delivered to specification, compliant with BSRIA BG29/BG50, and fully prepared for commissioning and handover.
Key Responsibilities:
Perform pre-commission cleaning, dynamic and static flushing, chemical dosing, and sampling of HVAC and water systems in accordance with BSRIA and project specifications.
Carry out closed and open loop water system flushing (e.g., CHW, LTHW, condenser, domestic hot & cold water).
Conduct system water quality testing, interpret results, and make chemical treatment adjustments accordingly.
Complete on-site testing including pH, conductivity, iron, hardness, and bacteria sampling (Legionella, TVC, etc.).
Maintain accurate documentation and produce reports such as flushing certificates, test results, and compliance records.
Coordinate with mechanical and commissioning teams to ensure timely execution of pre-commissioning activities.
Operate pumps, dosing rigs, side stream filters, and other related equipment.
Ensure flushing and chemical cleaning operations comply with HSE regulations and COSHH guidelines. * Troubleshoot and resolve water quality or system performance issues on-site.
Attend client/site meetings and provide technical input on water treatment processes when required.
Qualifications:
Proven experience (2+ years) in water treatment, pre-commission cleaning, or mechanical flushing.
Strong working knowledge of BSRIA BG29 & BG50 guidelines.
Familiarity with HVAC systems, pipework layouts, strainers, valves, and test points.
Experience handling water treatment chemicals, including inhibitors, biocides, and cleaning agents.
Ability to use and calibrate basic water testing equipment.
Excellent documentation, communication, and report-writing skills.
Full, clean driving license and willingness to travel to sites as needed.
Safe Pass card required; additional site certifications (e.g., confined space, MEWP) are a plus.
Preferred Experience:
Experience on large-scale data centre, commercial, life science, industrial, or healthcare construction projects.
Knowledge of closed loop, domestic systems, cooling towers, or cleanroom water treatment.
Legionella awareness training or water hygiene qualification.
Understanding of commissioning timelines and coordination with mechanical packages.
Experience supervising or mentoring junior technicians or subcontractors.
What We Offer:
Competitive salary and allowances.
Opportunities for certification and training (BSRIA, LCA, etc.).
Work with leading clients in data centers, pharma, commercial, and healthcare sectors.
Supportive team and opportunity for career progression.
Company vehicle and travel expenses (if applicable).
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