Aecom
Trusted global infrastructure consulting firm delivering engineering, design, construction management services.
Principal Water Quality Modeller
Lead water quality modelling for rivers, lakes, and coastal projects.
Job Highlights
About the Role
The Principal Water Quality Modeller role supports a multidisciplinary Water team in the UK, offering a flexible hybrid working model. This senior technical position will lead water quality assessments for rivers, lakes, transitional and coastal water bodies while collaborating with hydrologists, network modelers, and engineers. In this role you will act as the technical lead on a range of projects, develop innovative tools to improve efficiency, mentor junior staff, and shape bid strategies to enhance AECOM’s offering to water utilities, industrial developers, and local authorities. You will join a dynamic Water business of around 600 experts across the UK and Ireland, working alongside top‑tier engineers and consultants on projects that span from small initiatives to large‑scale ventures, from concept through to completion. • Build and validate water quality models using MIKE+, MIKE21/3, InfoWorks ICM, CORMIX, and SAGIS‑SIMCAT. • Conceptualise and scope modelling approaches, evaluating risks and opportunities. • Produce high‑quality technical reports that document model construction and uncertainties. • Lead and contribute to tender proposals, including multimillion‑pound framework contracts. • Mentor junior staff and support their professional development within the team. • Develop tools to improve efficiency and deliver innovative solutions for clients. • Foster client relationships and collaborate with multidisciplinary engineering teams. • Stay current with relevant legislation, guidelines, and industry standards. • Utilise AECOM’s project management systems to deliver outputs on time and within budget. • Conduct fluvial and coastal surface water quality projects from concept to completion. • Apply mass‑balance calculations using flow‑weighted and Monte Carlo methods. • Perform GIS analysis with QGIS, ArcGIS or MapInfo.
Key Responsibilities
- ▸water modelling
- ▸gis analysis
- ▸tool development
- ▸technical reporting
- ▸client management
- ▸mass balance
What You Bring
The ideal candidate has extensive experience with fluvial and coastal water quality modelling software (MIKE+, MIKE21/3, SAGIS‑SIMCAT, CORMIX), a strong track record of model builds for UPM studies, and solid knowledge of Environment Agency requirements. Proficiency in GIS, scripting (Python, R), mass‑balance calculations, and excellent communication skills are essential, alongside a Master’s degree in Hydrology, Engineering or a related field and progress toward CIWEM qualification. • Leverage scripting skills in Python, Anaconda or R to enhance modelling workflows. • Communicate complex technical information effectively, both written and verbally. • Hold a Master’s degree in Hydrology, Engineering or a related discipline and progress toward CIWEM qualification. • Access career development programmes, technical practice networks and AECOM University.
Requirements
- ▸python
- ▸r
- ▸mike+
- ▸gis
- ▸masters
- ▸ciwem
Benefits
AECOM fosters an inclusive, forward‑thinking environment with flexible hybrid working, career development opportunities, AECOM University, volunteering days, and personalised wellbeing benefits. Part‑time or flexible arrangements can be discussed to support work‑life balance. • Enjoy flexible hybrid working model and options for part‑time arrangements. • Receive a range of core and personalised wellbeing benefits, including volunteering days.
Work Environment
Hybrid