Our Leeds Water team continues to grow, driven by increasing demand for high-quality hydraulic modelling, hydrology and flood risk expertise across major UK infrastructure programmes. To strengthen our technical capability in this critical discipline area, we are seeking a Principal Hydraulic Modeller to take a key leadership role within our hydraulic and flood risk practice. In this senior position, you will lead and assure complex hydraulic modelling workstreams, providing expert guidance across Environment Agency and Natural Resources Wales frameworks, local authority flood risk schemes, and major infrastructure design and Development Consent Order (DCO) projects. You will oversee modelling assignments, develop robust hydrological assessments, ensure modelling outputs feed effectively into appraisal and design processes, and shape the technical direction of modelling delivery across the region. This is an exciting opportunity to apply deep technical expertise, guide multi-disciplinary teams, mentor emerging talent and influence strategic modelling capacity across Leeds and the wider North.
What You Will Do
* Lead development, calibration and assurance of 1D/2D hydraulic models using Flood Modeller, TUFLOW, InfoWorks or equivalent across feasibility, optioneering, outline design, full business cases and detailed design.
* Provide technical sign-off on modelling deliverables at senior (G6) level and ensure modelling approaches meet the standards required for major flood risk and infrastructure programmes.
* Act as technical lead or task manager for major Environment Agency, NRW and local authority projects; develop scopes, resource plans, programme schedules and fees for modelling work packages.
* Ensure delivery meets expectations for technical quality, cost control, risk management and programme, while leading internal reviews, audits and quality assurance processes.
* Coordinate external suppliers such as hydrology specialists and subcontracted modelling partners where appropriate.
* Mentor junior modellers, hydrologists and graduates; provide day‑to‑day technical guidance and act as escalation point for modelling challenges.
* Build strong working relationships with Environment Agency teams, local authorities and delivery partners.
* Present modelling outputs to technical and non‑technical audiences, support bidding activities and contribute to work‑winning and networking across Leeds and the wider North.
Professional Attributes
* Ability to lead technical teams and coordinate multi‑disciplinary delivery.
* Strong communicator capable of managing clients, stakeholders and internal delivery partners.
* Demonstrable experience providing senior technical oversight and quality assurance.
* Experience mentoring, coaching and developing early‑career professionals.
Qualifications
* Degree in Civil Engineering, Environmental Engineering, Hydrology or related discipline.
* Chartered (ICE, CIWEM or similar) preferred.
Arup is an equal opportunity employer that actively promotes and nurtures a diverse and inclusive workforce. We welcome applications from individuals of all backgrounds, regardless of age (within legal limits), gender identity or expression, marital status, disability, neurotype or mental health, race or ethnicity, faith or belief, sexual orientation, socioeconomic background, and whether you're pregnant or on family leave. We are an open environment that embraces diverse experiences, perspectives and ideas.
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