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Principal Flood Modeller
Work with Us. Change the World.
At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.
There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams to become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.
We're one global team driven by our common purpose to deliver a better world.
Senior Flood Modeller Job Description
Start here. Grow here.
“Are you ready to join a team of flood risk specialists and shape the future of the Water Industry?”
Our Water team is on the lookout for a passionate Senior Flood Modeller to join our dynamic and rapidly growing Water Business Line. This is your chance to help deliver high profile, influential projects across the UK and even further afield while working at the heart of one of the UK’s most ambitious and connected northern engineering hubs.
In this role, you will serve as a senior technical resource guiding our more junior staff and proactively developing our offering to local authorities, water companies, private and public sector clients.
About the Role: Key Responsibilities
At AECOM, you’ll play a key role in delivering high-quality flood modelling and hydrology projects. Under general supervision, you will:
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Develop and check hydraulic models (using software such as Flood Modeller, TUFLOW, Mike 11, Mike 21, HEC-RAS and ICM) for:
- Assisting the design of flood alleviation schemes,
- Delivering flood risk assessments, and
- Conducting reservoir flood studies.
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Develop water quality models (e.g., physico-chemical, biological, bacterial, or chemical) using software like MIKE, Delft3D, SIMCAT and/ or ICM.
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Conceptualise and scope modelling approaches, weighing risks and opportunities at each stage.
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Undertake and check hydrological assessments using methods like the Flood Estimation Handbook, ReFH2 and WINFAP.
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Lead input into tenders—ranging from innovative one-off projects and up to highly valued multi-million-pound framework agreements.
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Mentor junior staff as part of their professional development.
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Build strong client relationships and contribute across other technical disciplines.
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Stay up to date with developments in legislation and guidelines that affect our work.
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Use AECOM’s project management systems to ensure timely and budget-aligned quality outputs.
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Collaborate closely with clients, engineers, and specialists to deliver a wide range of fluvial, coastal, surface water, or drainage flood risk management projects.
About the Role: What We Will Provide
Work at AECOM, where we don’t just build infrastructure—we uplift communities and enhance lives. Accompany us in shaping the future of water risk management:
- Join a dynamic Water business boasting around 700 experts across the UK & Ireland.
- Collaborate with top-tier engineers and consultants for projects from concept to completion, delivering real impact.
Our Commitment to You
At AECOM, you’ll thrive in an inclusive and forward-thinking environment:
- Tailored career development opportunities, technical networks, workshops at AECOM University and volunteering initiatives.
- A flexible hybrid working model that balances work-life needs.
- Competitive salary and comprehensive benefits, designed around your lifestyle.
We’re proud to support every employee’s unique journey, with opportunities to negotiate part-time or flexible schedules.
Why Join Us?
- Tackle challenging, impactful water projects with a dynamic team.
- Work alongside industry leaders with a collaborative inclusive ethos.
- Access continuous learning and professional growth.
- Enjoy a competitive salary and benefits package, paired with flexible working options.
Qualifications & Requirements
We know transformative Senior Flood Modellers when we see them, and we’re looking for ambitious thinkers like you.
Must-Have Experience and Skills:
- Demonstrable technical strength in flood modelling software, e.g., MIKE, ICM, SIMCAT, Flood Modeller, and TUFLOW.
- Deep knowledge of Environment Agency requirements in flood risk assessments (e.g., ReFH2).
- Basic understanding of physico-chemical water quality and relevant freshwater regulatory standards.
- Strong verbal and written communication skills.
- Bachelor’s (or equivalent) degree in Civil Engineering or another relevant field.
- CIWEM (or equivalent) professional qualification, obtained or near completion.
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Additional Assets:
- Pragmatic knowledge of scripting such as Python, Anaconda, Ruby.
Attitude & Mindset:
- Self-motivated, autonomous — able to thrive in dynamic, deadline-driven environments.
- Willingness to learn and share expertise within a team setting.
This is a chance to push the limits of what’s possible and make an impactful contribution to the water sector. If this is you, let’s create something extraordinary.
About AECOM
We’re the world’s trusted infrastructure consulting firm, delivering solutions across project lifecycles (from advisory, planning and design to construction management). Our global teams partner with public and private sectors, tackling transportation, buildings, water, new energy, and environmental projects. Delivering on our mission to uplift communities, we pioneers in AI, sustainability, and human-centred innovation.
AECOM — Your Opportunity to FLourish
- Earn access to Fortune 500 resources, cutting-edge technology, and industry-leading expertise.
- Join our Disability Confident Employer initiative, cultivating a culture of equity and representation.
- Our global footprint provides transformational projects and work flexibility; we’re a publicly traded company, so you can grow alongside us.
Additional Information – Our Commitment to You
Diversity & Inclusion
AECOM celebrates diversity, including neurodiversity, valuing each contributor’s unique identity and background. If you require reasonable accommodations to apply, please reach out: [email protected].
Transparency and Growth
- You’ll enjoy interview opportunities under our Disability Confident Interview Scheme, if eligible.
- We commit to confidentiality and data safety under EEO policies.
*Application Support
Are you experiencing gaps or disabilities or thinking creative applications might prove your value? We’d love to hear from you!
Location/Specs
Business Group: DCS Legal Entity: AECOM Limited Business Line: Water Work Location Model: Hybrid Primary Location: UK - Bristol, 3 Rivergate.
(E-EIFF, #LI-RP1, #AECOMUKFLOODMODELLER)
Ready to Make a Difference?
Apply today—we can’t wait to hear what will be next for AECOM and the community we impact together!
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