2026 UK Graduate Wastewater Network Modelling Career Path

Location(s): Newcastle Upon Tyne, GB; Manchester, GB; Cardiff, GB; Reading, GB; Bristol, GB; Edinburgh, GB

Contract Type: Permanent. Work Pattern: Full Time. Market: Water. Discipline: Water.

Contact: earlycareers.recruitment@mottmac.com

About The Role

We’re looking for a Graduate Wastewater Network Modeler to join our Water Utilities Division, a centre of excellence that supports colleagues across our global business. You’ll tackle challenges such as 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 an opportunity to grow technical and project‑management skills through diverse, impactful project work, supported by senior and principal modellers and collaborating with the UK‑wide modelling team.

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

Candidate Specification

We are looking for committed and motivated graduates with a genuine passion and a desire to make a difference in the world.

• Minimum 12 months relevant experience (excluding placements)
• Minimum bachelor's degree, obtained no earlier than 2024 or expected by 2025, in one of the following disciplines: Geography, Hydrology and Water Management, Water and Environmental Engineering, Environmental Science, Civil Engineering, Mathematics.

In your application, demonstrate your genuine interest by highlighting relevant modules, previous work experience, or research related to our company, values, and projects.

We Are Looking For Graduates With The Following Characteristics

• Methodical approach to problem solving
• Initiative and efficiency in undertaking tasks independently
• Excellent verbal communication skills for liaising with clients and team members
• Excellent written communication and attention to detail

Benefits

• Biannual salary reviews during the first three years
• Competitive salary aligned with industry standards
• Contributory pension up to 7% of your salary
• Flexible benefits scheme allowing you to manage the range of benefits offered
• Access to sporting, social, and charity events, plus discounts on cinema tickets, travel, fashion, utilities, and more

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.

Agile working

We embrace agility, flexibility and trust to help you and your manager choose how you work most effectively to meet client, team, and personal commitments.

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