What You’ll Be Doing * Carrying out Pre-Com flushing and cleaning of closed systems * Performing back flushing, system cleansing, and chemical dosing * Supporting the preparation of systems ahead of commissioning * Working across heating and chilled water systems * Setting up and operating flushing rigs, pumps, and filtration equipment * Understanding of COSHH / chemical usage within bespoke systems * Ability to undertake on site test chemistry, interpretation of results and BSRIA water sampling. * Ensuring all works are completed in line with site procedures and health & safety standards * Completing job reports and documentation accurately * Supporting colleagues on larger or more complex projects What We’re Looking For * Proven experience in flushing / pre-commission cleaning * Working knowledge of BG29 and BG50 (or exposure to these standards) * Understanding of heating and chilled water systems * Ability to communicate confidently with clients, mechanical and commissioning engineers. * A hands-on, reliable approach with a strong work ethic * Willingness to travel and work away * Full UK driving licence What Would Set You Apart * Experience on construction or large commercial sites * Knowledge of water treatment or closed system maintenance * A desire to progress into a more technical or senior role What’s On Offer * Company vehicle / travel expenses covered * Overtime opportunities * Ongoing training and development * Clear progression into senior or technical roles * Opportunity to work on a variety of high-profile projects across the UK * 25 days annual leave * Pension