Water Treatment Engineer - Pre-Commissioning

ZipRecruiter; Hemel Hempstead; Hybrid; GBP 30,000 - 38,000; Full time

Job summary

A water hygiene specialist is seeking an experienced Pre-Commissioning Engineer for field-based work in London and surrounding areas. This role involves pre-commission cleaning, water testing, and working with project teams to ensure quality service delivery. Competitive salary of £30,000 – £38,000, alongside a company vehicle, paid travel time, and opportunities for overtime. Ideal for candidates with expertise in water treatment and a strong commitment to safety and detail.

Benefits

Company vehicle + fuel card

Paid travel time

25 days holiday + bank holidays

Pension scheme

Ongoing training and career progression

Qualifications

• Proven experience in pre-commissioning and water treatment of closed systems.
• Familiarity with BSRIA guidelines.
• CSCS card is essential.

Responsibilities

• Carry out pre-commission cleaning according to guidelines.
• Conduct water sampling and testing for quality.
• Produce detailed site reports and flushing certification.

Skills

Pre-commissioning experience

Water treatment knowledge

Attention to detail

Report writing

Education

NVQ Level 2 in Mechanical/Plumbing

Job description

Overview

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.

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
• 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.