Senior / Principal Water Quality Modeller

Senior / Principal Water Quality Modeller

Location: London, Bristol, or Cambridge (other locations across the UK considered)
Recruiter: Advance TRS - Contact: Alex Shaw

Due to continued growth and the award of major long-term water industry frameworks, our client is seeking experienced Senior and Principal Water Quality Modellers to join their expanding team.

You will work as part of a national network of specialists, collaborating with hydrologists, environmental scientists, and engineers to deliver complex and integrated water quality, catchment, and river modelling projects. These roles offer the chance to apply and develop cutting-edge modelling tools and techniques that directly influence key decisions on water quality compliance, storm overflow management, and climate adaptation.

• Deliver technically robust water quality and hydrodynamic modelling projects across river, catchment, and wastewater systems.
• Analyse complex environmental datasets to identify patterns, relationships, and predictive insights.
• Develop integrated river and catchment models, exploring sustainable and nature-based solutions to reduce pollution and enhance water quality.
• Collaborate across disciplines to deliver innovative, data-driven environmental and engineering outcomes.
• Contribute to proposals, bids, and business development by providing expert technical input.
• Build and maintain positive client relationships to ensure successful project delivery.
• Mentor and support junior colleagues and early-career professionals within the team.

Essential skills and experience:

• Degree in Environmental Science, Geography, Civil Engineering, Mathematics, or a related subject.
• Proven experience in water quality or river modelling projects within the UK water industry.
• Proficiency in software such as InfoWorks ICM, MIKE11, and/or Delft3D.
• Understanding of hydrodynamics, sediment transport, and pollutant fate processes.
• Strong analytical, problem-solving, and communication skills.

Desirable:

• Chartered or working towards chartership with a relevant professional institution.
• Experience in SOAF, UPM, or integrated catchment modelling studies.
• Coding or scripting experience (e.g. Python, R, MATLAB).
• Background in source apportionment, catchment management, or nature-based solutions.
• Experience mentoring or technically leading project teams.

• Work on nationally significant water and environmental projects shaping future infrastructure.
• Flexible working options (including part-time).
• Inclusive culture with a focus on wellbeing, sustainability, and professional growth.
• Competitive benefits package including private medical cover, pension contribution matching, enhanced family leave, and generous holiday entitlement.
• Strong career development and training pathways within an employee-owned business.

We are an equal opportunity employer and value diversity in our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.