Southern Water
Water Process Engineer
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Closing Date: 2026-08-03
Water Process Engineer
Location: Falmer, Sussex – Hybrid Working
Contract Type: Permanent
Hours: 37 hours per week
Salary: £44,800 - £54,800 depending on skills and experience
About the role
Southern Water is seeking a talented and motivated Water Process Engineer to join our growing Water Engineering team. This is an exciting opportunity to play a key role in delivering water treatment projects across the Southern Water region, supporting the design, optimisation and improvement of our water treatment assets.
Working as part of a multidisciplinary engineering team, you'll collaborate with Project Managers, Process Design Leads, and specialists across civil, mechanical, electrical and environmental disciplines to develop innovative and sustainable process solutions.
Your responsibilities will include producing technical design deliverables such as:
- Mass balance calculations
- Process sizing calculations
- Flow and water quality data analysis
- Process flow diagrams and schematics
- Control philosophies
- Performance specifications
- Technical reports and compliance documentation
- Commissioning and optimisation support plans
You'll work across a variety of projects, helping to develop solutions that improve operational performance, regulatory compliance and TOTEX efficiency while supporting Southern Water's long-term investment programme.
What you'll bring to the role
This role offers an excellent opportunity to further develop your career within a supportive, collaborative and technically focused engineering environment. We're looking for an engineer with a strong background in water treatment process design and experience delivering projects within the UK water sector. The successful candidate will have:
- Proven experience delivering water treatment process design projects, ideally gained within a UK water utility, engineering consultancy or contractor environment.
- Ideally 4-5 years' experience designing potable water treatment processes.
- Experience supporting Senior and Principal Engineers with the development of process designs and engineering strategies.
- Strong analytical skills with the ability to interpret flow, quality and operational data to evaluate asset performance and identify process improvements.
- Experience producing calculations, process flow diagrams, schematics and technical design documentation.
- Experience working within multidisciplinary project teams alongside civil, mechanical, electrical and environmental specialists.
- Ideally, experience supporting operational improvement, process optimisation and commissioning activities.
- An MEng, BEng or BSc in Chemical Engineering, Environmental Engineering, Chemistry or a Science related discipline.
- Membership of a relevant professional institution, or the desire to work towards Chartership.
- Excellent communication, collaboration and problem-solving skills.
- A full UK driving licence and willingness to travel to Southern Water offices and operational sites across the region would be advantageous, as occasional travel will be required.
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Progression opportunities
Southern Water offers career progression, training, and development opportunities.
About Southern Water
Southern Water is at the forefront of transforming Britain’s water industry, investing significantly to enhance resilience, sustainability, and service excellence. With £7.8bn planned investment for 2025-30, this is an unparalleled opportunity to join a business committed to delivering a generational shift in the way water services are managed.
At Southern Water, we believe diverse perspectives drive innovation. If you’re passionate about making a positive impact and think you can bring value to our team, we’d love to hear from you—even if you don’t tick every box. We welcome applicants from all backgrounds, identities, and experiences.
We do not discriminate based on race, ethnicity, gender, sexual orientation, age, disability, religion, or any other protected characteristic. If you need reasonable adjustments during the recruitment process, please let us know.
"At Southern Water, we believe diverse perspectives drive innovation. If you’re passionate about making a positive impact and think you can bring value to our team, we’d love to hear from you—even if you don’t tick every box. Your unique skills and experiences could be exactly what we need."
If this role isn’t quite what you’re looking for but are keen to be contacted about opportunities at Southern Water, you can register your details here: [Introduce Yourself](myworkdaysite.com- Introduce Yourself)
Our Commitment to Diversity
We welcome applicants from all backgrounds, identities, and experiences. We do not discriminate based on race, ethnicity, gender, sexual orientation, age, disability, religion, or any other protected characteristic. If you need reasonable adjustments during the recruitment process, please let us know.
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Additional information
In line with Southern Water’s security requirements, successful candidates will be required to provide evidence of their identity, eligibility to work in the UK, criminal record check (DBS) and verification of their employment and/or education history for the past three years. Appointment to this role is subject to the successful completion of all pre-employment checks, including security vetting. Please note that if a candidate does not meet the required security standards or fails to pass the vetting process, Southern Water reserves the right to withdraw the offer of employment. Some positions may also require higher levels of security vetting, which may involve providing additional documentation.
Our purpose is big. Our impact is huge.
And we know that every single one of us has the power, through our actions, to positively change society and the environment for good. It’s why careers with us have real meaning. Because, if you’re driven and ambitious, we can offer you huge opportunities for personal growth, professional development and constant innovation.
Forever evolving. Forever focused on doing the right thing, we empower and encourage everyone to play to their strengths and to help us shape a fair and positive future for all.
We believe in Water for Life. If you do too, Dive Right In.
Our customers are at the heart of everything we do, because delivering water for life is our core purpose. To achieve this, we need 24/7 support in place to resolve incidents quickly and efficiently. All our employees understand the importance of out-of-hours incident support – because when problems appear, fixing them is our top priority.
That’s why our people join together and support when and however needed to make sure our customers get the service they deserve.
Joining the Southern Water family means you’ll become part of our incident support team. During your interview, your manager will speak to you about any incident support rotas that apply to your position.
Does this opportunity excite you but you’re not 100% sure if you meet all the requirements for the role? Or are you concerned that ‘normal’ office hours aren’t possible given your personal circumstances?
Whilst we can’t accommodate every flexible working request, we’ll try to find a practical solution. So why not engage with us and find out more about this role?
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