Civil Engineering II - Waste Water Modeller

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AECOM is the world's trusted infrastructure consulting firm, partnering with clients to solve complex challenges and build legacies for future generations.

This Manila-based role sits within AECOM's Water modelling capability and will support wastewater, drainage, flood risk and integrated catchment projects for the US, UK, Ireland, Australia, New Zealand and other international markets. The position is intended to strengthen Manila as a credible delivery centre for high-quality modelling and technical delivery.

As a Wastewater Modeller, the successful candidate will contribute at Wastewater Modeller level, working closely with technical leads, project managers, engineers, GIS specialists and client-facing teams across AECOM.

Role purpose

We are looking for a Wastewater Modeller in Manila to support the delivery of wastewater network modelling, urban drainage, flood risk and pollution reduction projects. The role is suited to an engineer or modeller with practical modelling, GIS, data analysis and reporting capability, working under the guidance of senior and principal modellers.

The successful candidate will help develop, update, verify and analyse wastewater and drainage models, prepare clear technical outputs and contribute to integrated project delivery for international water clients.

Key responsibilities

Modelling and technical delivery

• Develop, update, calibrate and verify wastewater network models using InfoWorks ICM or similar industry-standard software.
• Support catchment-level and local network assessments for foul, storm and combined sewer systems.
• Run model scenarios and analyse outputs including flood volumes, spill volumes, surcharge results, capacity constraints and network performance.
• Support model build and maintenance activities, including GIS data review, system checks, sub-catchment analysis, area take-off and asset validation.
• Prepare hydraulic layers, maps, model outputs and structured technical deliverables for review by senior staff.

Data, reporting and collaboration

• Review and interpret rainfall, flow monitoring, asset, GIS, SCADA, EDM, CCTV and survey data to support modelling assessments.
• Prepare technical notes, figures, maps and supporting documentation in clear English for project teams and client-facing reviewers.
• Work with engineers, planners, environmental specialists, GIS specialists and survey teams to deliver integrated wastewater and drainage solutions.
• Contribute to modelling process improvement, standard workflows and consistent project documentation.
• Raise data gaps, model confidence issues, delivery risks and technical queries promptly for review.

Essential experience

• Experience in wastewater, drainage, flood risk, hydrology, hydraulic modelling, GIS or related water infrastructure work.
• Working knowledge of wastewater or hydraulic modelling software, preferably InfoWorks ICM.
• Ability to interpret GIS data, asset records, rainfall and flow monitoring data.
• Strong analytical skills and attention to detail when reviewing model inputs and outputs.
• Clear written and verbal communication skills in English.
• Ability to work collaboratively across time zones and follow agreed project standards, workflows and review processes.

Desirable experience

• Exposure to UK, Ireland, Australia, New Zealand or other international water industry projects.
• Experience with flood risk assessment, CSO / SWO assessment, development impact assessment or wastewater asset planning.
• Experience using QGIS, ArcGIS, MapInfo, InfoAsset, AutoCAD, MicroStation, HEC-RAS, TUFLOW, Flood Modeller Pro or similar tools.
• Awareness of water company modelling standards, integrated catchment planning, storm overflow reduction or drainage area planning.

The ideal candidate will be a careful and curious modeller who can turn data and model outputs into clear technical insight. They should be comfortable learning international standards, asking good questions and contributing to reliable project delivery from Manila.

• Bachelor's degree in Civil Engineering, Environmental Engineering, Water Resources, Hydrology, GIS, Geography or a related discipline.
• Relevant professional development, technical training or membership of a recognised engineering or water-related professional body would be beneficial.

At AECOM, we are committed to maintaining a secure and trustworthy recruitment process and take any fraudulent hiring activity seriously. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment.

About AECOM 

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan. 

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2025. Learn more at aecom.com. 

What makes AECOM a great place to work 

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you’ll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you’ve always envisioned. Here, you’ll find a welcoming workplace built on respect, collaboration and community - where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines.