Job Details

Job Title: Water Treatment Pre-Commissioning Engineer
Location: Croydon, Greater London
Salary/Benefits: £25k – £45k + Training & Benefits

About the Company

Our client is a well-respected name within the Water Treatment / Commissioning industry. They are looking for a Pre-Commissioning Engineer to join their busy outfit within the South East of England. Applicants will be expected to demonstrate strong technical knowledge and must have proven hands‑on experience, ideally across a mixed portfolio of client sites. This is a fantastic company to join if you would like to join a growing and skilled outfit, who can offer competitive salaries, benefits and training plans.

Work Locations

Locations of work will include: Croydon, Bromley, Sidcup, Orpington, Dartford, Gravesend, Sevenoaks, Caterham, Oxted, Redhill, Epsom, Mitcham, Sutton, Twickenham, Weybridge, Guildford, Southall, Windsor, Bracknell, Maidenhead, Harrow, Watford, Windsor, Barnet, Potters Bar, Cheshunt, Enfield, Chigwell, Epping, Ilford, Barking, Romford, Hornchurch, Grays, Tilbury.

Experience and Qualifications





- Proven experience working as a Water Treatment Pre‑Commissioning Engineer within a well‑established outfit
- Fully conversant in BSRIA and ACOP L8 guidelines
- Work across a range of commercial, public sector, local authority and manufacturing sites
- Able to produce detailed service reports
- Regularly meeting / exceeding targets
- IT competent

Role Responsibilities

- Undertaking the full range of pre‑commissioning duties across a variety of client sites
- Powerflushing and back‑flushing
- Flushing of various systems and pipework (including CHW and LTHW) in line with BSRIA guidelines
- Chlorinations on domestic pipework
- Mains injections
- Clean & disinfection routines on cooling towers and CWST
- Chemical dosing
- Producing regular service reports for clients
- Travelling in line with client requirements

Alternative Job Titles

Water Treatment Engineer, BSRIA Flushing Engineer, Flushing Technician.

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📌 Water Treatment Pre-Commissioning Engineer (Croydon Shire)
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📍 Croydon Shire