Senior Water Quality Modeller

Senior Water Quality Modeller – Mott Mac Donald

Locations:
London, Cambridge, Bristol, Manchester, Leeds, Birmingham, Edinburgh, Brighton, Glasgow, Sheffield, London (additional UK locations may be considered).

The Water Consultancy Division of Mott Mac Donald seeks a Senior Water Quality Modeller to work with a multidisciplinary team delivering complex environmental engineering projects. The role includes both bespoke and industry‑standard hydrodynamic and water quality modelling packages, with opportunities to innovate beyond current standards.

• Lead complex modelling projects and collaborate with experts across disciplines.
• Analyse large datasets, distil patterns and relationships, and provide insights for effective interventions.
• Assist in proposal writing and support new business development with technical input.
• Maintain client relationships and manage project deliverables.
• Support, train, mentor, and develop junior colleagues.

• Relevant degree‑level qualification (e.g., geography, mathematics, environmental sciences, civil engineering, or related discipline).
• Chartered with an appropriate professional body.
• Track record in delivering successful SOAF, UPM and/or river modelling projects for UK water companies.
• Good understanding of hydrodynamics, sediment and water quality processes.
• Expertise in industry standard software such as Info Works and/or MIKE
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• Willingness to innovate and guide junior staff.

• Coding skills and statistical foundations.
• Experience with source apportionment assessments, catchment management modelling, or application of nature‑based solutions to pollution.
• Knowledge of climate‑change impacts and regulatory compliance for water bodies.

Full-time or part‑time base. Mott Mac Donald offers a comprehensive benefits package including:

• Private medical insurance for all UK colleagues.
• Health cash plan and wellbeing support.
• Financial wellbeing: pension matching 4.5%–7%, life assurance up to 4× basic salary, income protection and flexible benefits.
• Lifestyle: minimum 33‑35 days holiday with increase after 5 years, employee saving schemes.
• Enhanced family and carers leave.
• Learning and development: annual professional subscription, mentoring, training, and self‑development opportunities.
• Networks, communities and social outcomes including support for LGBTQ+, gender, race, ethnicity, disability and parents/carers.

We put equality, diversity and inclusion at the heart of our work, encouraging applications from people of all backgrounds.

Mott Mac Donald Ltd is not currently offering sponsorship for the Skilled Worker visa route in the UK. We welcome applicants eligible for alternative immigration routes.