Closing Date
2026-08-28
Job Title: Wastewater Modeller
Location:Falmer – Hybrid working
Contract Type:Permanent
Hours:37 hours per week
Salary:Up to £50,000 depending on skills & experience
About the role:
Join us as a Wastewater Modeller and help shape the future of our wastewater networks.
You will sit within our Modelling team and play a vital role in understanding, predicting, and improving the performance of our wastewater systems. Your work will directly support planning, investment, and environmental protection across the region.
This is an excellent opportunity for someone with 3–5 years of modelling experience who wants to deepen their technical capability,andgain hands on project exposure.
What you will be responsible for:
Build, develop, and maintain hydraulic models of wastewater networks and treatment systems.
Analyse operational, GIS, and asset data to understand network behaviour and highlight risks.
Support planning, design, and regulatory programmes through evidence based modelling outputs.
Work with engineering, operations, and environmental teams to address flooding, pollution, infiltration, capacity constraints, and resilience issues.
Translate modelling outputs into clear, practical recommendations for technical and nontechnical audiences.
Contribute to continuous improvement in modelling processes, tools, and data quality.
Additional requirements specific to the role:
Occasional site visits for surveys, network investigations, or stakeholder meetings.
Hybrid working with some travel to team locations as required.
What you’ll bring to the role:
Essential
3–5 years of experience in wastewatermodelling
Experience using hydraulic modelling tools such as InfoWorks ICM
Strong analytical and problem-solving skills with attention to detail
Ability to interpret complex data and turn insights into actionable recommendations
A collaborative mindset and willingness to work across multidisciplinary teams
A relevant technical qualification (engineering, environmental science, geography, maths or similar)
Eitherrecently chartered orworking toward professional chartership
Desirable
Progression opportunities
This role offers access to training, modelling tool development, internal mentoring, and future progression into Senior Modeller, Network Specialist, or broader Asset/Planning roles.
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.
You will join at a time of significant change, working alongside a highly skilled leadership team with a clear vision for the future. We offer an environment where professionals can make a meaningful impact, influence strategic decisions, and drive long-term value creation.
Our Commitment to Inclusion
We understand that great talent comes in many forms. If this role excites you and you share our commitment to delivering sustainable solutions for our communities, please apply—even if your experience doesn’t perfectly match every requirement. We’ll support your growth and development.
If this role isn’t quite what you’re looking for but you’d like to be contacted about opportunities at Southern Water, you can register your details here:
Introduce Yourself:https://wd3.myworkdaysite.com/en-US/recruiting/southernwater/SouthernWater/introduceYourself
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.
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.
We are one of the largest water and wastewater companies in the South East of England and thrive on the passion and hard work of more than 2,000 employees.
Together we supply 532 million litres of drinking water every day to more than two million customers and treat and recycle 717 million litres of wastewater for more than four million customers in Kent, Sussex, Hampshire and the Isle of Wight.
Water is essential to every aspect of our lives and we're proud to be at the heart of managing water and wastewater services. We drink it, cook with it and use it to clean. Our water supply faces big challenges - the population of the South East is growing fast, and climate change is bringing greater risk of droughts and more extreme weather. It’s a future of more people needing water and wastewater services, with less water to go around.
So, together with our customers and communities, we aim to provide a sustainable, high-quality water and wastewater service that helps us create a resilient future for water in the South East.
Find out more about us:
Website: www.southernwater.co.uk
Facebook: www.facebook.com/SouthernWater
Twitter: @SouthernWater
Instagram: @southernwatermedia
We use market research tools to improve our service. For more info, visit: https://www.southernwater.co.uk/our-customers/privacy
