Principal Wastewater Modeller

Principal Wastewater Modeller –  Egis UK

Catchment Management | CSOs performance | Sustainable Infrastructure | SuDS

Shape the Future of Water Infrastructure with Egis

• London | Bristol | Manchester (Hybrid)
• Hydraulic Modelling and Civil Design | UK‑Wide Impact | High‑Growth Environment

Egis is expanding rapidly in the UK, backed by a global team of more than 23,500 experts across 70+ countries. We design and deliver intelligent, sustainable infrastructure to address climate challenges and strengthen community resilience. As part of our fast‑growing UK Water team, you will join an agile environment where progression is quick, visibility is high, and your impact is immediate.

In the UK we're proud to be delivering some of the most iconic projects which help connect people, protect our environment and meet emission reduction targets. From motorways to tramways, nuclear power plants to smart cities, clients choose us to help them solve their most complex challenges - delivering climate-responsible growth that meets the needs of communities, industry and the planet.​

Job Description

About the Role

The UK water sector is entering a period of unprecedented investment and transformation. As Egis accelerates the growth of its Water Business in the UK, we are building a high-performing multidisciplinary team covering a wide range of services including Flood Risk, Civil Engineering, Nature based Solutions and Hydraulic Modelling; we are going to work for clients both in the regulated and non-regulated sectors including water companies, energy providers, developers and local government among others.

We are looking for an experienced wastewater modeller to take a lead role in developing our services, mainly for water companies, in relation to urban drainage and sewer modelling, supporting them and informing their asset investment decisions through their optioneering and detail design phases.

This is a rare opportunity to join Egis at a key stage of our UK growth journey, helping to shape and expand a wastewater modelling capability in the UK, built on Egis’ global infrastructure expertise and long-term commitment to the sector.

Key Responsibilities

• Take a leading role in developing our Infoworks ICM network modelling expertise, promoting best practice and innovation
• Promote the use of blue and green infrastructure in addition to traditional engineering solutions; champion the use of sustainable drainage systems (SuDS)
• Mentor less experienced colleagues supervising the quality of deliverables
• Work with our teams across the UK, Ireland and France to develop and deliver a range of hydraulic modelling services to our clients
• Provide technical and expert advice to clients, manage and deliver projects
• Support business development opportunities, contribution to tenders and proposals
• Develop and maintain relationships with clients, partners and stakeholders
• Collaborate with wider Egis teams to develop market leading and innovative services to our clients
• Participate in industry events, seminars and conferences. Showcase Egis technical capability and project experience.

Qualifications

Areas of Past Experience

• Experience developing, verifying/calibrating and checking/reviewing Infoworks ICM models for wastewater and urban drainage networks; experience in water quality modelling would be useful but not essential
• Good understanding of hydrological assessment and analysis (e.g. FEH, ReFH)
• An interest and experience in developing digital tools to promote hydraulic modelling efficiency. Knowledge of scripting / automation (e.g. Python, Ruby etc) advantageous
• Experience with other hydraulic modelling packages would be beneficial e.g. Tuflow, Mike, Flood Modeller Pro
• Experience in flood risk modelling, assessment and mapping would also be beneficial

Key Attributes

• Hands on, delivery and client focused
• Energised with a positive and strong work ethic
• Excellent interpersonal, communication and presentation skills
• Passionate about supporting and mentoring colleagues in their development
• Ability to work in multi-disciplinary and remote teams
• Innovative mindset, always looking to improve, automate, streamline, learn and develop

Qualifications

• BSc/Eng or MSc/Eng in Civil, Water or Environmental Engineering disciplines
• 8+ years of experience
• Obtained or near to obtaining professional qualification with CIWEM or similar.
• Demonstrable client, contractor or consultancy experience in UK Water Sector
• Demonstrable knowledge of regulator (e.g. Environment Agency), modelling requirements and technical standards

Please note that you must have the right to work in the UK to be considered for this position.

Additional Information

What’s in It for You?

• An exciting new growth role in a fast‑organic growing UK business, offering clear and accelerated career progression
• Top Employers 2025 - Egis recognised across four continents for excellence in HR practices, having been awarded the prestigious Top Employer 2025 certification. Top Employers Institute is the global authority on recognising excellence in people practices.
• A global leader in green infrastructure - we’re proud to lead the way in sustainable infrastructure, mobility and energy, innovating across the entire value chain and every aspect of the built environment.
• Highly competitive reward package
• Hybrid and flexible working
• 26+ days annual leave plus bank holidays
• Professional development, chartership support & global mobility
• Supportive, inclusive culture driven by sustainability and long‑term community impact

Ready to Lead?

Join Egis and play a pivotal role in shaping the future of sustainable water infrastructure across the UK.We are committed to our planet

In each project we design, engineer and operate we care deeply about the legacy we’re leaving behind. As part of our team, you’ll have a unique opportunity to use your skills and expertise to shape a better future for our communities in the UK, and all around the globe.

Our commitment is translated in the work carried out by our Egis Foundation, which funds concrete actions to address the climate crisis and is focused on educational and social initiatives that will help in the responsible and sustainable shift towards a sustainable world.

We are an Equal Opportunities employer and we strive to build a workforce that truly reflects the communities we represent. We welcome candidates from all backgrounds, regardless of age, disability, gender, gender identity, gender expression, race, religion or belief, sexual orientation, socioeconomic background, and any other protected characteristic. If you decide to apply for an opportunity with us, your application will be assessed based purely on your experience, the essential and desirable criteria, and your suitability for the role. We value each and every one’s contribution as this builds our culture and means that if you work with us, you will be included, listened to, and respected.