Lead Clean Water Network Modeller

Arcadis; Plymouth; On-site; GBP 70,000 - 90,000; Full time

Job summary

Arcadis is seeking a Principal Clean Water Modeller to lead the development and application of clean water distribution network models, supporting planning, resilience, and capital delivery projects.

You will lead modelling strategies, ensure outputs are fit for purpose, and mentor junior modellers while collaborating with clients and internal teams to deliver robust, auditable results.

Qualifications

• Degree (or equivalent) in Civil Engineering, Water Engineering, Environmental Engineering, or related discipline.
• Significant experience in clean water distribution network modelling within consultancy or water company environments.
• Strong understanding of water distribution hydraulics and operational behaviour.
• Proven ability to produce high-quality technical documentation and QA records.
• Chartered (or working towards chartership) with a relevant professional institution (ICE, CIWEM) is desirable.
• Experience with water quality modelling concepts (water age, chlorine decay) and automation / QA tools is a plus.
• Experience developing automation, QA tools, or advanced GIS/data workflows is desirable.

Responsibilities

• Act as technical lead for clean water modelling commissions, defining modelling strategies and ensuring outputs are fit for purpose.
• Provide independent technical assurance, model reviews, and sign-off of deliverables with clear audit trails.
• Develop and promote best practice, guidance, and standard templates across the modelling community.
• Build, update, and maintain clean water network models (steady-state and EPANET/EPANET-like extended period simulation).
• Carry out calibration and validation against flow, pressure, and level data.
• Deliver scenario modelling to support growth, resilience, outage planning, pressure management, leakage reduction, and investment planning.
• Lead technical discussions with clients, explain assumptions and results, support scope definition and data strategy.
• Mentor and develop junior and senior modellers, supporting technical excellence and capability growth.
• Contribute to resource planning, task leadership, and a collaborative team culture.
• Support bids and proposals, including defining modelling methodologies, scope, programme, and fee inputs.

Job description

Arcadis is seeking a Principal Clean Water Modeller to lead the development and application of clean water distribution network models, supporting planning, resilience, and capital delivery projects.

You will lead modelling strategies, ensure outputs are fit for purpose, and mentor junior modellers while collaborating with clients and internal teams to deliver robust, auditable results.