Water Treatment Engineer
| Posting date: | 22 January 2026 |
|---|---|
| Salary: | £120 to £150 per day |
| Hours: | Full time |
| Closing date: | 21 February 2026 |
| Location: | Croydon, CR0 4WD |
| Remote working: | On-site only |
| Company: | Additional Resources Ltd |
| Job type: | Permanent |
| Job reference: | CMA/AR/070018 |
Summary
An exciting opportunity has arisen for a Water Treatment Engineer to join a well-established company providing air and water treatment, maintenance, and commissioning services for HVAC and water systems across commercial, healthcare, and leisure sectors.
As a Water Treatment Engineer, you will be responsible for ensuring water systems are clean, compliant, and fully operational. This full-time permanent role offers a salary range of £120 - £250 per day and benefits.
You will be responsible for
- Planning and executing pre-commissioning cleaning and flushing programmes for new and refurbished pipework, heating, and chilled water systems.
- Performing high-velocity flushing to meet industry cleanliness standards.
- Applying water treatment chemicals, including biocides, corrosion inhibitors, and scale inhibitors, and adjusting dosages as required.
- Conducting on-site water sampling, testing, and interpreting laboratory results.
- Supporting commissioning teams during system start-up, including maintaining dosing pots, filtration units, and related equipment.
- Maintaining comprehensive site records, logbooks, and final commissioning reports in line with regulatory requirements.
- Acting as the technical point of contact for clients and project teams, troubleshooting water system issues as they arise.
What we are looking for
- Previously worked as a Water Treatment Engineer, Commissioning Engineer, Water Commissioning Engineer, Water Treatment Technician, Water Systems Engineeror in a similar role.
- Proven experience of 3 years in water treatment, commissioning, or flushing engineering.
- Strong knowledge of industry standards and guidelines, such as BSRIA, for pre-commission cleaning and water quality management.
- Valid CSCS card andFull UK driving licence.
- Practical experience in chemical testing and water quality analysis for various systems (e.g., LTHW, chilled water, domestic).
- Ability to calculate system volumes and chemical dosing accurately.
This is a fantastic opportunity for an experienced Water Commissioning and Flushing Engineer to progress their career with a specialist organisation.
Important Information: We endeavour to process your personal data in a fair and transparent manner. In applying for this role, Additional Resources will be acting in your best interest and may contact you in relation to the role, either by email, phone or text message. For more information see our Privacy Policy on our website. It is important you are aware of your individual rights and the provisions the company has put in place to protect your data. If you would like further information on the policy or GDPR please contact us.
Additional Resources Ltd is an Employment Business and an Employment Agency as defined within The Conduct of Employment Agencies & Employment Businesses Regulations 2003.