Hydrological Modelling and GIS Analyst

About the role

This position is part of Aon’s Impact Forecasting Flood team, developing catastrophe flood models for the re/insurance industry. You will work on large‑scale hydrological modelling and GIS processing to turn precipitation data into flood footprints and loss estimates for clients.

Key responsibilities

• Collaborate with the Flood team on rainfall‑runoff modelling and flood mapping.
• Calibrate and test large‑scale rainfall‑runoff models using gauge and historical precipitation data.
• Develop and refine stochastic flood event sets based on calibrated models.
• Lead GIS and data workflows linking flood footprints, event definitions and exposure data to quantify losses.
• Maintain and enhance event response infrastructure using external data (e.g., satellite flood footprints) and internal flood zones.
• Contribute to post‑event and predictive workflows to recreate recent floods and estimate impacts for ongoing or forecast events.
• Automate and stabilise processing pipelines using Python and GIS tools.

Required profile

• University degree in Hydrology, Cartography, Meteorology, Climatology, Geography, Mathematics or a related Earth‑science field.
• Strong skills in either GIS and raster data processing OR hydrology/environmental modelling, with a desire to grow in the other area.
• Experience using a scripting or programming language (Python or R) to automate tasks, preferably applied to GIS, raster or environmental data.
• Careful, structured approach to working with data, including basic quality checks and clear documentation.

Required skills

• Python
• R
• GIS and raster data processing
• Hydrological rainfall‑runoff modelling
• Linux
• Git
• Cloud or remote server environments
• Catastrophe modelling and flood risk assessment

What we offer

• Comprehensive benefits package and an inclusive workforce.
• Agile environment supporting wellbeing and work‑life balance, including two Global Wellbeing Days per year.
• Variety of working‑style solutions and a continuous learning culture.
• Equal‑opportunity workplace with accommodations for applicants who need them.