> Markdown version of [/jobs/ext/4642299-principal-wastewater-modeller](https://www.wearedevelopers.com/jobs/ext/4642299-principal-wastewater-modeller). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Principal Wastewater Modeller

- **Company:** AECOM
- **Location:** Chesterfield, United Kingdom
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Mathematical Software, Working Model 2D
- **Published:** November 9, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/principal-wastewater-modeller/55487638

## About the Role

Degree (BEng/MEng or MSc) in Civil Engineering, Environmental Engineering, Water Resources, or related discipline.
Extensive experience in wastewater network modelling within a consultancy or water utility environment.
Strong proficiency in industry-standard modelling software (e.g., InfoWorks ICM).
Strong understanding of UK water industry regulations, AMP cycles, and wastewater planning frameworks.
Proven ability to lead projects and provide technical direction.
Excellent communication and stakeholder management skills.
Chartered status (CEng) or working towards chartership is desirable.

You will also be self-motivated with an ability to work both autonomously where required, with a strong sense of commitment, a willingness to learn and a desire to work in a dynamic deadline driven team environment.
At AECOM, we believe in creating a better world through innovative and sustainable solutions. If you share our vision and are ready to make a difference in the water industry, we want to hear from you.

## Description

"Are you ready to join a team of wastewater modellers and shape the future of the Water Industry?"
Join our dynamic and multidisciplinary Water Team as a Principal Wastewater Modeller. You can be based in one of our UK or Ireland offices whilst also taking advantage of our flexible hybrid working model.
You will be a key player in delivering impactful water projects across the UK and internationally. We enable the development of significant flood alleviation schemes, pollution reduction, and infrastructure projects, and this variety will be fundamental to your continuous professional growth . A unique aspect of our approach is that our modelling team is fully integrated with the wider project teams, ensuring that our modellers work closely alongside experts in other areas to develop comprehensive solutions.
As an industry leader in Blue-Green infrastructure and nature-based solutions, we work with both public and private sector clients such as Severn Trent, Anglian Water, Northern Ireland Water, the Environment Agency, LLFAs and other infrastructure providers. We deliver Flood Risk Assessments, Drainage Strategies, Outline Business Cases, hydraulic models, and detailed designs. We shape industry standards by advising and developing guidance that benchmarks best practices, keeping AECOM at the forefront of the water industry. This position offers an exceptional opportunity to support a talented, diverse team committed to innovation, collaboration, and efficiency.
Here's what you'll do:
Lead the development, calibration and verification of wastewater network models (e.g., InfoWorks ICM or similar platforms).
Provide technical oversight and quality assurance across multiple projects, operating under general direction while guiding wider project teams.
Undertake and oversee technical and administrative tasks of limited to moderate complexity related to hydrology and groundwater investigations where required to inform wastewater modelling studies.
Deliver assignments that may span the broader field of hydrology and related technical disciplines, working to defined project terms with appropriate professional review.
Analyse complex datasets and modelling outputs, preparing clear, high-quality technical reports and client deliverables.
Monitor and interpret data to assess the impacts of upstream activities on wastewater systems and the wider environment, ensuring compliance with relevant permits and regulatory conditions.
Act as technical lead on major frameworks and modelling programmes, supporting strategic planning, storm overflow reduction, and network resilience initiatives.
Mentor and develop junior team members and contribute to bids and business development activities.