Senior Hydrologist

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 and become part of a global team of nearly 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 have secured places on major frameworks with the Environment Agency, National Grid, Wessex Water, Anglian Water, National Highways, Southern Water and South West Water. As well as our existing major infrastructure clients we have a large pipeline of work which we would love you to be part of.   

We’re one global team driven by our common purpose to deliver a better world. Join us.

Start here. Grow here.

Our Water team is on the lookout for a passionate Senior / Principal Hydrologist to join our dynamic and rapidly growing Water Business Line in Bristol. 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 engineering hubs.

Here’s what you’ll do:

• Produce flood hydrological assessments which are assisting the design of flood alleviation schemes, flood risk assessments or the preparation of Environment Agency flood maps.
• Apply industry standard guidance (FEH) to derive flood flows estimations for a range of catchment types throughout England.
• Produce high quality technical reports.
• Use GIS tools (ArcGIS Pro, QGIS) to support your work.
• Technically review hydrological assessments produced within AECOM.
• Build relationships with clients and across other technical disciplines.
• Keep up-to-date with developments in methodologies and guidelines that may affect our services and share them with the team.
• Be an active member of our national community of hydrologists and hydraulic modellers.

Come grow with us.

We are a growing team who service a wide variety of clients, which will be at your fingertips to explore.

Our current clients in the UK vary from local government, water companies and private developers. We also have large contracts for Middle Eastern clients where you could be working on some of the most ambitious projects in the world. Example projects / frameworks are:

• Nationally Significant Infrastructure schemes where detailed flood modelling is needed to robustly inform the flood risk assessments.
• Great Grid Partnership which is enabling the UK’s energy transition and comprises of 17 major onshore and offshore projects.
• Environment Agency Mapping and Modelling Framework delivering national, catchment and local scale flood risk mapping and modelling to support the EA’s obligations to its customers.
• Thames Water Professional Services Framework covering the multidisciplinary services, engineering services and environmental services.
• Severn Trent Water Design Services Framework supporting the construction of major schemes.
• Southern Water Strategic Delivery Partner supporting Kier in the delivery of non-infrastructure water and wastewater projects.
• Wessex Water Capital Delivery Framework which comprises projects from optioneering to detailed design, including environmental investigations.

Why Join Us:

We are a close-knit team of engineers, technicians, hydrologists, hydraulic modellers and project managers. Some of us spend most of our working time in the office, and some regularly work from home. We meet every week to check in, share news and plan work. We work hard to give our team development opportunities, whether that is a secondment to see the client’s perspective, an assignment to spend time on site to manage a construction contract, or arranging training to allow you to grow.

In joining the team you will have the opportunity to shape your career, Perhaps you would like to help develop our international offering, drive innovation through technology, or act as a mentoring champion to develop our team. We will make sure you get the opportunities and responsibilities you need.

Now's your time to:

• Be part of a dynamic team that tackles challenging and impactful water projects.
• Work alongside industry-leading professionals and thought leaders.
• Engage in a collaborative and inclusive work environment.
• Access to continuous learning and development opportunities.
• Earn a competitive salary and comprehensive benefits package.
• Enjoy the flexibility to work in a way that fits your lifestyle while supporting a healthy work–life balance.

Ready to push the limits of what’s possible?

Here’s what we’re looking for:

• Evidence of experience in the estimation of flood flows using FEH and REFH2.
• Deep understanding of statistical hydrological analysis.
• Demonstration of working with hydraulic modellers to calibrate hydraulic models.
• Experience in rating reviews.  
• Bachelor's degree (or equivalent) in Civil Engineering or other relevant discipline
• Working towards being a Chartered member of ICE or CIWEM
• Strong GIS skills using QGIS, ArcGIS and / or MapInfo.
• Practical knowledge of scripting programmes such as R, Python, Anaconda, Ruby would be advantageous.
• Low-flow analysis studies for WINEP projects would be advantageous.

You will also be self-motivated with an ability to work both autonomously where required, with a strong sense of commitment, a willingness to learn and a desire to work in a dynamic deadline driven team environment.

At AECOM, we believe in creating a better world through innovative and sustainable solutions. If you share our vision and are ready to make a difference in the water industry, we want to hear from you.

Application Support

We celebrate diversity, including neurodiversity, and believe it enriches our team. We welcome applications from all backgrounds and abilities. If you are an applicant with a disability that requires reasonable accommodation to complete the application process, please contact us at [email protected]. At AECOM, we value everyone's unique contributions and perspectives.

If you meet some of the requirements above or have transferable skills you believe would benefit us, we would be delighted to hear from you!

#LI-RP1 #AECOMUKWATERMODELLING  #AECOMUKWATERHYDROLOGIST

At AECOM, we are committed to maintaining a secure and trustworthy recruitment process and take any fraudulent hiring activity seriously. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment.

About AECOM

AECOM is the world’s trusted infrastructure consulting firm, delivering professional services throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. On projects spanning transportation, buildings, water, new energy and the environment, our public- and private-sector clients trust us to solve their most complex challenges. Our teams are driven by a common purpose to deliver a better world through our unrivaled technical and digital expertise, a culture of equity, diversity and inclusion, and a commitment to environmental, social and governance priorities. AECOM is a Fortune 500 firm and its Professional Services business had revenue of $16.1 billion in fiscal year 2025. See how we are delivering sustainable legacies for generations to come at aecom.com and @AECOM.

Freedom to Grow in a World of Opportunity 

You will have the flexibility you need to do your best work with hybrid work options. Whether you’re working from an AECOM office, remote location or at a client site, you will be working in a dynamic environment where your integrity, entrepreneurial spirit and pioneering mindset are championed.

You will help us foster a safe and respectful workplace, where we invite everyone to bring their whole selves to work using their unique talents, backgrounds and expertise to create transformational outcomes for our clients.

AECOM provides a wide array of compensation, benefits and well-being programs to meet the diverse needs of our employees and their families. We’re the world’s trusted global infrastructure firm, and we’re in this together – your growth and success are ours too.

Join us, and you’ll get all the benefits of being a part of a global, publicly traded firm – access to industry-leading technology and thinking and transformational work with big impact and work flexibility. As an Equal Opportunity Employer, we believe in each person’s potential, and we’ll help you reach yours.

We are a Disability Confident Employer and will offer an interview to applicants who have a disability or long-term condition, who meet the minimum/essential criteria for the role. Please let us know using this email address [email protected]  if you would like to apply through the Disability Confident Interview Scheme.

All your information will be kept confidential according to EEO guidelines.