Hydraulic Modeller

Office Locations: Christchurch (Dorset), London, Woking (Surrey), Aldershot (Hampshire)

About the role

Mayer Brown Ltd is seeking an experienced Senior or Principal Hydraulic Modeller to support the growth of our hydraulic modelling and hydrology services.

Our work focuses on fluvial and surface water hydraulic modelling, helping clients understand flood risk, inform development proposals and design effective mitigation. This is an opportunity to take a leading technical role, deliver a varied portfolio of projects and help shape our expanding modelling capability.

We welcome applications from experienced Senior/Principal Modellers who are excited by the prospect of helping to mould and shape our Hydraulic Modelling services and support our Hydraulic Modelling Lead in developing this side of the business.

Key responsibilities

• Develop, review and deliver hydraulic models for fluvial and surface water flood risk assessments.
• Build and apply 1D, 2D and linked 1D–2D models, principally using TUFLOW and associated modelling software.
• Define modelling approaches, data requirements and survey specifications appropriate to each project.
• Represent watercourses, floodplains, drainage features, culverts, bridges and other hydraulic structures.
• Assess existing and proposed flood risk, including climate change, blockage, sensitivity testing and mitigation options.
• Diagnose model instability and mass balance issues, undertake quality assurance and maintain clear modelling records.
• Interpret modelling results and communicate their implications through clear reports, mapping and advice.
• Work with hydrology colleagues to develop suitable inflows and boundary conditions.
• Liaise with clients, the Environment Agency, Lead Local Flood Authorities and other stakeholders, including responding to technical review comments.
• Manage project programmes, budgets and deliverables, coordinating with the wider project team.
• Support and mentor junior colleagues and contribute to technical standards and modelling procedures.

At Principal level, the role will also include leading technical reviews, overseeing multiple projects, developing client relationships and supporting bids, fee proposals and business development.

Essential skills and experience

• A degree in civil engineering, environmental engineering, hydrology, geography or a related discipline.
• Substantial experience delivering hydraulic modelling projects within a UK consultancy or comparable environment.
• Strong practical experience of TUFLOW/Flood Modeller, including fluvial and surface water applications.
• Experience of 1D river modelling and linked 1D–2D models, using ESTRY, Flood Modeller or equivalent software.
• A sound understanding of river hydraulics, overland flow, hydraulic structures and floodplain processes.
• Confidence selecting model parameters and boundary conditions, evaluating uncertainty and resolving numerical issues.
• Experience using GIS to prepare model inputs, interrogate results and produce flood mapping.
• Working knowledge of relevant UK flood risk guidance and Environment Agency and LLFA modelling expectations.
• Experience preparing clear technical reports and supporting models through regulatory review.
• Strong communication, organisation and project management skills, with the ability to work independently and collaboratively.

Desirable skills and experience

• Experience of FEH statistical methods, WINFAP and ReFH2.
• Experience assessing development impacts and designing flood mitigation measures.
• Experience of model calibration and validation using observed flood records.
• Python or other scripting skills for data processing and modelling workflow improvements.
• Chartered status, or progress towards chartership with a relevant professional institution.
• Experience mentoring colleagues, reviewing technical work and developing client relationships.

The opportunity

You will play an important role in developing Mayer Brown’s hydraulic modelling services, with scope to influence technical approaches, support colleagues and take ownership of challenging projects. The position offers the opportunity to combine detailed modelling work with project leadership and client engagement.

The appointment will be made at Senior or Principal level, reflecting the successful candidate’s experience and ability to lead technical delivery.

Why Mayer Brown?

Mayer Brown is an independent consultancy specialising in transport planning, highways and infrastructure design. Our integrated approach allows us to support development projects from their earliest stages through planning, detailed design and construction.

Joining us means you can expect:

• Varied project experience across different development sectors and project scales.
• Real responsibility, with opportunities to work directly with experienced colleagues, clients and project teams.
• Career development, including structured support towards professional qualification and chartership.
• Accessible senior colleagues and the opportunity for your ideas and contribution to be recognised.
• A collaborative working environment where technical quality, practical solutions and good client service matter.
• Hybrid working, normally with at least three days each week based in your Mayer Brown office.
• Opportunities to develop your career as the business continues to grow.

What we offer

• Competitive salary and benefits package.
• 25 days' annual leave, increasing with service.
• Life assurance.
• Cycle to Work Scheme.
• Payment of an appropriate professional institution subscription.
• Support towards professional development and chartership.
• Flexible and hybrid working arrangements.
• Regular team and social events.

Be the Difference

We want talented people to grow with Mayer Brown.

We value integrity, collaboration and respect, and aim to create an environment in which people can develop their skills, take responsibility and build rewarding long-term careers.

We welcome applications from people from all backgrounds and are committed to equality, diversity, inclusion and belonging throughout our business.

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