Water Scientist jobs

Powered by Water, Driven by Purpose

At Pennon Group, we’re proud to serve communities while protecting the environment. Together with our subsidiaries, South West Water, Bristol Water, Bournemouth Water, SES Water, Pennon Water Services and Pennon Power, we’re leading the way in water and renewables.

We’re proud to be recognised as a leader in the UK water sector, working towards a greener future. Our goals? As well as lowering our carbon footprint, we’re working with partners to plant 300,000 trees, restore peatlands and supporting farmers and landowners to improve water quality and wildlife.

Whether you’re starting out or seeking a new challenge, our scale and ambition create opportunities for you to shape your own career.

Ready to make a splash? Join our team today.

Location: Exeter, Bristol, Redhill & Bournemouth

Shape the Future of Water Resources at Pennon Group

At Pennon Group, we're committed to securing sustainable water supplies for millions of customers across the South West, Bristol and the South East. As climate change, population growth and environmental pressures continue to challenge the water sector, we're investing in cutting-edge modelling and analytics to help shape the future of water resource management.

We're growing our Water Resources Modelling team and are looking for talented professionals at all levels, from early-career modellers through to experienced and senior specialists. Whether you're developing your modelling expertise or already leading complex water resources projects, we'd love to hear from you.

Working across South West Water, Bristol Water and SES Water, you'll play a key role in delivering innovative modelling solutions that support operational decision-making, drought resilience, strategic planning and regulatory requirements

What you'll be doing:

Depending on your level of experience, you'll have the opportunity to:

• Develop, maintain and enhance water resources models.

• Analyse water resource systems to support planning and operational decisions.

• Undertake drought and resilience assessments.

• Support Water Resources Management Plans (WRMPs) and long-term strategic planning.

• Build and improve modelling workflows using Python and industry-leading tools.

• Interpret and communicate technical outputs to a wide range of stakeholders.

• Contribute to innovative solutions that improve water security and environmental outcomes.

• Collaborate with experts across engineering, planning, environmental and operational teams

What we're looking for:

We're interested in hearing from candidates with experience in some of the following areas:

• Water resources modelling and planning.

• Hydrology, environmental science, civil engineering, geography, mathematics, physics or related disciplines.

• Strong numerical, analytical and problem-solving skills, with the ability to interpret complex datasets and modelling outputs.

• Python programming and data analysis.

• Water industry modelling platforms such as Pywr, Aquator, MISER or similar tools.

• Scenario modelling, drought planning and resilience studies.

• Data management, visualisation and model assurance.

• Communicating technical information to both specialist and non-technical audiences.

We welcome applications from graduates, analysts, modellers, senior modellers and technical specialists who are passionate about helping solve some of the water sector's biggest challenges.

Why join us?

This is an opportunity to see the direct impact of your work on the security and sustainability of water supplies across our regions. You'll join a collaborative and highly skilled team where innovation, continuous improvement and professional development are actively encouraged.

In return, we offer:

• Competitive salary aligned to experience and level.

• Hybrid and flexible working arrangements.

• Generous holiday allowance plus bank holidays - with the option to buy/sell leave

• A discretionary Bonus

• Competitive Contributory Pension

• Share-save Scheme

• Various health benefits

• Wellbeing support programmes

• A range of Group Discounts

• Cycle to Work Scheme

Closing Date: 25th November 2026

We may close this vacancy early if we receive a high volume of applications. We encourage you to apply as soon as possible.

Please note that the successful candidate will be subject to a mandatory DBS check as part of the onboarding process.

Be yourself, we like it that way. Together, we will build a culture of belonging, where inclusion is instinctive. Diversity is our strength and a reflection of our communities. We care, we value everyone, we celebrate uniqueness.

Our core values, which are essential to our success, are:

Be Rock Solid - Build trust and be trusted. Be the one we all look to and can depend on.

Be You - We want you to bring your best everyday. Be yourself and make your mark in your individual way.

Be the Future - Embrace change. Drive Progress. Own the challenge.