2026 UK Graduate Wastewater Network Modelling Career Path

Bristol, United Kingdom / Cardiff, United Kingdom / Edinburgh, United Kingdom / Manchester, United Kingdom / Newcastle Upon Tyne, United Kingdom / Reading, United Kingdom

Before making an application, please browse all graduate opportunities available as we will only accept one application per candidate. Once you have made an application you will not be able to make changes to your selection or make a new application. The exception is if we open new vacancies in the new year.

To avoid missing out on your preferred role, we recommend applying as early as possible, as positions will close once filled.

Turn your ambition into action - apply now and shape your future with us.

Job Description

Engineer a Better Tomorrow - For People, Planet, and Progress

At Mott MacDonald, we're more than just an engineering, management, and development consultancy-we're a purpose-driven community of passionate individuals committed to shaping a better future. As a wholly employee-owned business, we choose our own direction and focus on what truly matters: delivering meaningful outcomes for our clients, empowering our people, and making a positive impact in the communities where we live and work.

We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact. It's our people who power that performance-we succeed when they do.

About the Role

We're currently looking for a Graduate Wastewater Network Modeller to join our Water Utilities Division, a centre of excellence that supports colleagues across our global business. You'll be part of a team tackling some of the most pressing challenges of our time-climate change, ageing infrastructure, pollution incidents, Combined Sewer Overflow (CSO) spills, and population growth-by designing resilient wastewater networks and delivering major pipeline transfers and drainage systems that protect communities and the environment.

This role offers a fantastic opportunity to grow your technical and project management skills through diverse and impactful project work. You'll be supported by senior and principal modellers and collaborate across our UK-wide modelling team, gaining exposure to national and international water frameworks.

What You'll Be Doing:

• Build and calibrate 1D and 2D hydraulic models
• Assess and influence CSO activity and operation to meet sector targets
• Evaluate foul water flooding and wastewater network resilience
• Develop mitigation solutions and present options to clients
• Work with industry-standard modelling software, GIS, and coding tools
• Produce high-quality reports and visualisations
• Collaborate with multidisciplinary teams across the business

Requirements

To be eligible for this opportunity, you will have less than 12 months' relevant experience (excluding placements) and have a minimum of a bachelor's degree (obtained no earlier than 2024) or expected to achieve one, in one of the following degree disciplines:

• Geography
• Hydrology and Water Management
• Water and Environmental Engineering
• Civil Engineering
• Mathematics

We are looking for graduates with the following characteristics:

• Methodical approach to problem solving
• Ability to use your initiative to undertake tasks efficiently and independently
• Excellent verbal communication skills, which allow you to confidently liaise with clients and team members
• Excellent written communication and attention to detail

Benefits

Join us, and you'll get:

• Biannual salary reviews: we believe that hard work should be rewarded and recognised
• A competitive salary: in addition to biannual reviews, we will ensure that you're given a salary that matches the current industry standard
• Contributory pension up to 7% of your salary: we have the best people on our team, and we like to look out for them
• A flexible benefits scheme: our company is made up of a range of different people and we understand that different people want different things

Equality, diversity and inclusion

We put equality, diversity and inclusion at the heart of our business, seeking to promote fair employment procedures and practices to ensure equal opportunities for all. We encourage individual expression in our workplace and are committed to creating an inclusive environment where everyone feels they have the opportunity to contribute.

More about Mott MacDonald

We're a global engineering, management and development consultancy. Our purpose is to improve society by considering social outcomes in everything we do, relentlessly focusing on excellence and digital innovation, transforming our clients' businesses, our communities and employee opportunities. A fundamental part of this is respecting each person's differences and striving to meet their needs.

Our values: progress, respect, integrity, drive, excellence