Principal Wastewater Modeller

At AECOM, we are delivering a better world. Our work helps people and communities thrive. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 professionals delivering projects that create a positive impact around the world.

Are you ready to support a team of talented engineers, modellers and consultants and help shape the future of the water industry? Join our dynamic and multidisciplinary Water Team as a Principal Wastewater Modeller in our rapidly growing Edinburgh and Glasgow offices – whilst also taking advantage of our flexible hybrid working model.

In this role, you will be one of the lead technical team members supporting junior members to deliver top quality projects. This position offers an unparalleled opportunity to support a talented, diverse team committed to innovation and efficiency.

Here’s what you’ll do:

• Serve as the principal technical advisor and subject matter expert for wastewater system modeling and analysis, providing guidance to project teams and junior staff.
• Provide specialised technical input to planning studies, alternatives analyses, and design related to wastewater collection, conveyance, treatment, and wet weather system performance.
• Develop, maintain, and standardize wastewater modeling methodologies, procedures, and best practices to ensure high-quality, defensible, and cost-effective technical work.
• Lead and participate in interdisciplinary reviews of planning, modeling, and design deliverables to ensure consistency between hydraulic modeling, process design, and overall project objectives.
• Develop and review planning-level and design-level cost estimates, including capital improvement costs and level-of-effort estimates for modeling and technical analyses.
• Apply expert knowledge across all phases of wastewater modeling contributions to PS&E packages, including flow development, model calibration, capacity analysis, and support of design criteria.
• Perform quality control and peer review of hydraulic and process model setups, assumptions, calculations, and technical documentation.
• Prepare and review technical memoranda, modeling reports, and specification sections related to wastewater modeling, data requirements, and performance criteria.
• Provide technical input to the development of engineering budgets, schedules, and work plans, ensuring modeling tasks are appropriately scoped and aligned with regulatory and project requirements.

If you’re passionate about innovation and turning bold ideas into reality, we want to hear from you!

You’ll thrive in an inclusive and forward-thinking environment where your contributions are valued. You’ll enjoy a range of core and personalised benefits designed to support your future and well-being, customised to fit your lifestyle. Take advantage of career development opportunities, technical practice networks, AECOM University, volunteering days and our flexible hybrid working model to ensure a work-life balance that suits you.

Qualifications:

• A degree (or equivalent) in Civil Engineering, Environmental Sciences, GIS, Geography, or similar subject.
• Chartered member or approaching chartership with ICE or CIWEM.
• Extensive experience in wastewater modeling.
• Strong proficiency in GIS and data analysis to support wastewater modeling, particularly using ArcGIS for network development, spatial data management, and results visualization.
• Understanding of wastewater hydrology and hydraulics, including dry weather flow, wet weather flow, infiltration and inflow (I/I), and climate change impacts, within the UK and international regulatory contexts.
• Proven experience with wastewater and integrated urban drainage modeling platforms, such as Innovyze InfoWorks ICM, InfoWorks WS Pro, SWMM, or equivalent tools used for sewer system and integrated catchment modeling.
• Demonstrated experience acting as technical lead for wastewater modeling projects, responsible for model strategy, quality assurance, client interface, and mentoring junior modelers.
• Strong background in water and wastewater consultancy, delivering planning, regulatory, and capital improvement projects for utilities and public-sector clients.

We celebrate diversity, including neurodiversity, and believe it enriches our team. We welcome applications from all backgrounds and abilities.