My journey into hydrology

Date published: 12 November 2025

Helena Preston

Associate Hydrologist, SLR Consulting

Helena specialises in nutrient neutrality and the interface between hydrology and Biodiversity Net Gain. She leads flood risk assessments, surface water drainage plans, and Water Framework Directive evaluations across UK infrastructure, residential, and energy projects, integrating ecological and hydrological expertise.

Finding my path through experimentation


My journey into hydrology hasn’t been a straightforward one, but it’s a story of discovery through persistence. I originally trained in music but I soon realised that a traditional path in that field wouldn’t ignite my passion. While working in NHS administration and raising a young family, I decided to take a leap and study for a Bachelor of Science (BSc) in Geosciences part-time through The Open University. 

Balancing full-time work, parenthood, and study wasn’t easy, but it gave me the confidence to explore a completely new direction. After completing my degree, I went on to do an MSc in Water Management which opened the door to the environmental sector. This marked the start of a career built on curiosity, problem solving, and determination.

Overcoming setbacks and learning from trial and error

My route into hydrology certainly wasn’t without obstacles. Early in my career, I sometimes faced scepticism because my qualifications were non-traditional, so I had to prove myself through practical experience.

One of my proudest achievements has been gaining chartership with the Chartered Institute of Water and Environmental Management (CIWEM). It didn’t come easily – it took me 10 years in the sector and 2 attempts to succeed. That first attempt was humbling, but it taught me that resilience is just as important as technical skill. It reminded me that growth often comes from embracing challenges rather than avoiding them.

Making a difference in the environment

Today, as an associate hydrologist at SLR Consulting, I work on projects that protect habitats and enhance local ecology, with a particular focus on wetland design and nature-based flood solutions. These are areas that first captured my interest during my studies and continue to inspire me every day.

Beyond my technical work, I also enjoy engaging with schools and running workshops to share my career journey. I encourage students to explore STEM subjects, try new things, and not be afraid to experiment even when the outcome isn’t clear. Curiosity, adaptability, and persistence can be just as valuable as formal qualifications.

Lessons learned and advice for aspiring engineers

If there’s one thing I’ve learned, it’s that resilience, mentorship, and continuous learning are key.

I always encourage young people to consider flexible education routes, seek mentors who will champion their growth, and build confidence through practical experience. Most importantly, don’t fear mistakes – they don’t define your capability, they refine it.

For me, Dare to discover, means exactly that: being willing to take uncharted paths, learn from setbacks, and use curiosity and persistence to make a real difference in the world around us. 

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Early in my career, I sometimes faced scepticism because my qualifications were non-traditional, so I had to prove myself through practical experience. 

— Helena Preston, Associate Hydrologist, SLR Consulting