Engineer – Water Supply Network Modelling

Job Description

Key responsibilities

Capacity assessment and developer services

•   Assess connection applications, developer enquiries and planning applications against the utility’s connection and capacity criteria.

•   Carry out network capacity checks and detriment analysis to determine the impact of proposed development flows on existing customers.

•   Calculate development demands and flow rates by development type and usage profile.

•   Undertake desktop network assessment where no calibrated model exists, using GIS, asset records and engineering judgement.

•   Recommend engineered solutions where criteria are not met — pipe upsizing, on-site boosting, storage provision or alternative points of connection.

•   Prepare technical response letters and draft formal responses for issue in accordance with the client’s delegated-authority and QA procedures, and maintain enquiry tracking records.

Hydraulic modelling support

•   Support model build, verification and calibration tasks including data collection and validation, water and reservoir balances, demand analysis, and flow and pressure calibration.

•   Build and run peaked and future-scenario models for growth and design horizon assessment.

•   Undertake fire flow analysis and level-of-service checks.

•   Report data gaps, GIS anomalies and modelling inconsistencies to the project lead.

Delivery and communication

•   Work to client turnaround targets across a high volume of concurrent enquiries.

•   Coordinate directly with overseas counterpart teams on data requests and technical queries.

•   Prepare maps, schematics and supporting documentation using GIS.

•   Contribute to process improvement and workflow automation where opportunities are identified.

Quality assurance and delegated authority

This role carries real technical decision-making, within a defined and supervised framework. What you decide independently, and what must be checked before it leaves the team, is set out clearly from day one.

What the role decides independently

•   Determination of standard connection and capacity enquiries that fall clearly within the client’s published criteria, following a supervised assessment period. That period is normally expected to be approximately three months, but is dependent on demonstrated competency and client requirements.

•   Selection of assessment method — model-based or desktop — for routine enquiries, and the supporting demand and flow calculations.

•   Day-to-day technical correspondence with counterpart teams on data, records and clarifications.

What requires second-party technical check before issue

•   All outputs during the supervised assessment period, without exception.

•   Any assessment recommending network reinforcement, capital works or client expenditure.

•   Any refusal, rejection or conditional response to a developer.

•   Any case where the network fails to meet the client’s level-of-service criteria.

•   Non-standard, phased or large-scale developments, and any case where desktop engineering judgement substitutes for a calibrated model.

What must be escalated

•   Any proposal to vary, interpret or depart from the client’s published design criteria — escalate to the Technical Delivery Lead. This role does not hold authority to vary client criteria or commit AECOM to a technical position outside the agreed scope.

•   Data quality or model confidence issues material enough to undermine the assessment.

•   Any query touching scope, programme or commercial terms.

Record and audit

•   Self-check every assessment against the client QA/QC checklist before submitting it for review.

•   Maintain an auditable record for each enquiry — assumptions made, data sources used, criteria applied and the basis of the determination — sufficient for a third party to reconstruct the decision.

Qualifications

Essential experience

•   Typically 3 to 6 years of experience in water supply network analysis, water distribution design or hydraulic modelling.

•   Sound hydraulic fundamentals: demand calculation, headloss and pressure performance, storage and boosting requirements, and the ability to interpret results against defined criteria.

•   Working knowledge of hydraulic network analysis in a recognised platform.

•   Competent use of GIS — ArcGIS, QGIS or MapInfo — for network review, plotting and data checks.

•   Clear written English; this role produces client-facing correspondence and technical responses.

•   Accuracy and consistency working to a defined procedure at volume, and the judgement to know when a case does not fit the standard route.

•   Bachelor’s degree in Civil, Water Resources Engineering, Environmental & Sanitary Engineering.

Must be amenable to work in a fixed night shift schedule and 3 days onsite per week. 

Additional Information

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.