Hydraulic Modeller

Joining Arup

Arup’s purpose, shared values and collaborative approach has set us apart for over 75 years, guiding how we shape a better world. We work across the entire water cycle, with utilities, local and regional governments, commercial and domestic water users and other partners. From designing and maintaining key water infrastructure to advising on natural catchments and flood defences, we help clients to consider the long‑term economic, environmental and social dimensions of their proposals.

Watch this short clip to discover how Arup are shaping a better world and how you could be a part of it!

We are seeking fluvial hydraulic modellers to play a vital role in delivering flood risk management business cases and design projects. We want people who are passionate about rivers, flooding and the environment. Our work focuses on creating innovative solutions at both local and catchment scales, grounded in nature‑based systems and pioneering low‑carbon technology.

You will join a technical delivery team that works collaboratively with colleagues across our multidisciplinary firm on a diverse range of projects of national and global significance. With secured frameworks in place, we have a strong pipeline of opportunities with clients who share our commitment to shaping a better world, including the Environment Agency and Natural Resources Wales.

We also invest in bespoke research to advance our knowledge and digital tools, often in partnership with others. You will have the chance to experience all aspects of engineering, science and research, and to learn from a welcoming and talented team around you.

We are looking for an early‑career hydraulic modeller with curiosity, personal drive, and technical know‑how. You will be as inspired as we are by the problems we are solving and excited to be part of the team delivering the solutions. Experience in the water and environment sector is preferred.

We are looking for the following qualifications, attributes, and skills:

• Masters or Bachelor’s degree in a relevant technical field (e.g. geography, environmental science, civil engineering).
• Excellent verbal and written communication skills and strong numerical skills.
• Experience using hydraulic modelling software on flood risk projects – preferably Flood Modeller, ESTRY, and TUFLOW.
• Competent in the use of GIS software such as QGIS or ArcGIS.
• Experience writing technical hydraulic modelling reports.
• A desire to learn, work in a team, and produce high‑quality work you are proud of.
• Willingness to investigate innovative solutions to solve difficult modelling challenges.

Nice to have:

• Awareness of hydrological assessments.
• Experience delivering optioneering, appraisal and justification of FCERM projects and nature‑based solutions.
• Experience in Flood Risk/Consequence Assessments.
• Experience developing FCERM business cases.
• Digital/coding skills such as Python, FME and Excel.
• Ability to present technical findings through meetings, presentations, and reports.
• Experience of supporting junior hydraulic modellers.
• Experience of client and stakeholder engagement and working across multi‑disciplinary teams.
• Working towards professional accreditation.

Not ready to apply just yet, or have a few questions? Contact Ali Wallace –

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At Arup, we care about each member’s success, so we can grow together.

Guided by our values, we provide an attractive total reward package that recognises the contribution of each of our members to our shared success. As well as competitive, fair and equitable pay, we offer a career in which all our members can belong, grow and thrive through benefits that support health and wellbeing, a wide range of learning opportunities and many possibilities to have an impact through the work they do.

We are owned in trust on behalf of our members, giving us the freedom, with personal responsibility, to set our own direction and choose work that aligns with our purpose and adds to Arup’s legacy. Our members collaborate on ambitious projects to deliver remarkable outcomes…