Wastewater modeller

Southern Water; Brighton; Hybrid; GBP 45,000 - 55,000; Full time

Job summary

Southern Water is looking for a Wastewater Modeller to join their Modelling team in Brighton. You'll play a crucial role in understanding and improving wastewater systems, working in a hybrid environment. The ideal candidate will have 3–5 years of modelling experience, strong analytical skills, and a technical qualification in a relevant field.

This position offers opportunities for professional growth, including training and advancement into senior roles. Join us to shape the future of our wastewater networks.

Qualifications

• 3–5 years of experience in wastewater modelling.
• 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.
• Collaborative mindset and willingness to work across multidisciplinary teams.

Responsibilities

• Build, develop, and maintain hydraulic models of wastewater networks.
• Analyse operational and GIS data to understand network behaviour.
• Support planning through evidence-based modelling outputs.
• Work with teams to address flooding and pollution issues.
• Translate modelling outputs into clear recommendations.

Skills

Wastewater modelling

Hydraulic modelling tools

Analytical skills

Problem-solving

Collaboration

Education

Technical qualification (engineering, environmental science, geography, maths)

Tools

InfoWorks ICM

Job description

Closing Date

2026-07-10

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, and gain 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.

Essential

• 3–5 years of experience in wastewater modelling
• 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)
• Either recently chartered or working toward professional chartership

Desirable

• Experience working with operational or regulatory wastewater programmes
• Knowledge of wastewater network performance, risk assessment, or asset planning
• Experience in the use of AI optimisation tools
• Experience in writing scripts/codes to help with automation of parts of the modelling process

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.

Legal EEO Statement

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.

Security and Pre‑Employment Checks

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, a 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.