Water Treatment Manager

Workplace type: On-site (office + UK site travel)

Location: Kings Langley, Hertfordshire

Job type: Full-time

Seniority level: Mid-Senior level

Salary range: £65,000 – £75,000 + company car + private healthcare scheme + gym + performance bonus (with progression as the division grows)

• Company car: Company car (available for personal use) with a monthly rental value
• Pension: Automatically enrolled into the WJ Salary Sacrifice Pension Scheme. Contributions are made at 5% for both employee (minimum) and employer (maximum).
• Private Healthcare: At six months of service, option to be enrolled into Westfield Health Cash Plan for Specialist Consultations & Diagnostics, Scanning Service (MRI, CT & PET Scans), Optical, Dental, Chiropody and Therapy Treatments (Physiotherapy, Acupuncture, Chiropractic, Homeopathy and Osteopathy)
• Profit Related Bonus: A profit related annual bonus will be payable in December if WJ meets its profit targets
• Group Life Insurance: Automatically included in the WJ Death in Service Group Insurance at 3 times salary after 6-month probation period
• Gym Membership: Exclusive, discounted access to thousands of gyms, pools and spas with just one pass via our fitness partner, Hussle

About the role

Build a business, not just a role. WJ is investing in water treatment as a standalone division with its own P&L — and we need the person to lead it. Reporting to the Operations Manager, you'll be the technical authority for treatment across the business, oversee delivery of projects involving treatment, and shape the strategy, fleet and capability of the service line, with a clear trajectory to become its business lead.

What you'll do

• Design and deliver treatment solutions: construction discharge (fines/pH), contaminated groundwater and surface water, and industrial/process water.
• Develop new capabilities including tunnelling/TBM treatment (with treatment dewatering) and bentonite treatment.
• Lead commissioning and performance-proving of plant against consents and contract requirements.
• Support business development with proposals, pricing and client presentations as the pipeline grows.

What you'll bring

• A science/engineering degree and proven plant design, build and commissioning experience.
• Strong operational experience on live sites, from optimisation to troubleshooting.
• Working knowledge of discharge consents, permitting and water quality compliance.

The ambition to grow a service line into a P&L business.

About WJ

WJ is the UK’s leading water management specialist the partner and contractor of choice for major construction and infrastructure programmes. Founded by academics and evolved through expertise, we apply scientific principles to solve complex water challenges: over 40 years’ experience and 4,000+ projects worldwide, including the Channel Tunnel Rail Link, the London Olympic Park, Crossrail, Tideway, HS2 and currently Sizewell

C. Our expanding service lines span dewatering & groundwater control, water treatment, surface water management, I&M, pumping tests, well drilling and professional services which are grounded in engineering, delivered in partnership. Our values of Confidence, Pride, Clarity & Integrity, and Independence guide every decision we make, and our ambitions are big: the AMP8 water sector, defence, energy and infrastructure markets.

Reports to

Operations Manager (Line Manager).

Direct Reports

None initially. Directs shared operational staff on treatment activities;
Project Managers will be assigned to the role as standalone treatment contracts are secured.

The position is expected to develop into the business lead for the water treatment division.

Key relationships

Operations Manager, Head of Business Development, Sales Manager & Sales Team, Design/Technical Team, Project Managers, Engineers, Managing Quantity Surveyor, Finance Manager, Clients, Principal Contractors, Consultants, Environment Agency & Regulators, Equipment & Chemical Suppliers.

Key areas of responsibility

Service Line Development & Business Growth

• Define and implement the strategy, capability roadmap and commercial model for WJ’s water treatment service line, working towards a standalone division with its own P&L.
• Develop WJ’s…