Job Opportunity: Pre-Commissioning Engineer – Water Hygiene Location: London & Surrounding Areas (field-based) Salary: £30,000 – £38,000 (DOE) Overtime Vehicle Benefits Employment Type: Full-Time, Permanent We are recruiting for an experienced Pre-Commissioning Engineer to join a leading water hygiene and treatment specialist, delivering high-quality services across commercial and industrial sites in London and the South East. This is an exciting opportunity for a skilled engineer with a strong background in pre-commission cleaning of closed water systems to join a forward-thinking company that values expertise, safety, and progression. The Role: As a Pre-Commissioning Engineer, you will be responsible for carrying out BSRIA-compliant flushing, chlorination, and water quality testing of closed heating and chilled water systems on construction and retrofit projects. Key Responsibilities: * Carry out pre-commission cleaning (BSRIA BG29/2021) * Flushing and dosing of closed-loop heating and chilled systems * Conduct water sampling and testing (pH, conductivity, biocide levels, etc.) * Disinfection of water systems in accordance with ACOP L8 and HSG274 * Produce detailed site reports and flushing certification * Work with project teams and site managers to ensure delivery to specification * Maintain high standards of health & safety on site Requirements: * Proven experience in pre-commissioning and water treatment of closed systems * Familiarity with BSRIA guidelines (BG29 & BG50) * CSCS card (essential) * NVQ Level 2 or equivalent in Mechanical/Plumbing (preferred) * Full UK driving licence * Strong attention to detail and report writing skills * Willingness to travel to various sites across London and the surrounding areas What’s On Offer: * Competitive salary (£32,000 – £40,000 depending on experience) * Company vehicle fuel card * Paid travel time and overtime opportunities * 25 days holiday bank holidays * Pension scheme * Full PPE and equipment provided * Ongoing training and career progression Interested? If you’re a skilled Pre-Commissioning Engineer looking to join a dynamic and growing team, we’d love to hear from you. Apply now with your CV or get in touch for a confidential discussion