Water Treatment Engineer
Effective Recruitment Solutions Ltd
London · posted 21 August 2026
Salary
£36,000 – £40,000 a year
Job type
full time
Location
London, London
Category
Construction
Water Treatment Engineer
Water Treatment Engineer. We are looking for an experienced Water Treatment / Water Hygiene Engineer to join a growing building services business, covering sites across London and the South East.
This is a mobile, hands-on position carrying out planned maintenance, water hygiene, treatment and remedial works across a range of commercial properties, schools and council buildings.
The Role
As a Water Treatment Engineer, you will be responsible for:
Carrying out PPM works in accordance with ACOP L8, HSG274 and SFG20
Delivering Legionella control and water treatment services
Servicing and maintaining water softeners, filtration units, TMVs and dosing equipment
Carrying out closed-system analysis, dosing and flushing
Maintaining cooling towers and associated equipment
Testing and maintaining ClO2 equipment
Carrying out site audits and ensuring water hygiene logbooks are accurate and up to date
Identifying and completing remedial works
Carrying out site surveys of domestic water services where required
Assisting with the installation, servicing and commissioning of water treatment equipment
Assisting with water tank repairs, replacements and chlorination
Liaising with the Help Desk regarding planned maintenance works
Ensuring COSHH documentation and site records remain compliant
What We're Looking For
You should have previous experience working within water treatment and/or water hygiene, with a good understanding of:
ACOP L8
HSG274
Legionella control
Water treatment systems
TMVs
Closed systems
Dosing and flushing
Water hygiene compliance
A City & Guilds qualification in Risk Assessment, Water Treatment or similar is desirable.
Plumbing or mechanical engineering qualifications and knowledge of HTM 04-01 / HTM 01-05 would also be beneficial but are not essential.
You must hold a full UK driving licence.
Package
£36,000 - £40,000 depending on experience
Company van
Company phone
40-hour permanent contract
Up to 25 days holiday + bank holidays
Pension scheme
Ongoing training and career progression
If you're an experienced Water Treatment or Water Hygiene Engineer looking for a permanent mobile position covering London and the South East, please apply today
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