Principal Engineer - Wastewater/ Stormwater Network Modeling

Technical leadership

·    Lead the development, calibration and verification of wastewater network models using InfoWorks ICM or similar platforms.

·    Act as technical lead or senior reviewer on major modelling projects, frameworks and programmes.

·    Provide technical oversight and quality assurance across multiple projects, ensuring models, calculations, assumptions and deliverables are robust and traceable.

·    Guide strategic planning, storm overflow reduction, network resilience, growth assessment, flood risk and pollution reduction initiatives.

·    Support scope development, tender responses, fee inputs and technical approaches where required.

Manila capability and team development

·    Help build Manila as a trusted centre for wastewater modelling and InfoWorks ICM delivery.

·    Mentor and develop junior, senior and specialist modelling staff through technical guidance, structured review and knowledge sharing.

·    Develop or improve workflows, quality checklists, modelling standards, training material and lessons learned for repeated use across projects.

·    Support workload planning, task allocation, review sequencing and escalation of technical or delivery risks.

·    Promote consistent communication between Manila delivery teams and client-facing teams in the UK, Ireland, Australia, New Zealand and other markets.

Data, analysis and client support

·    Analyse complex datasets and modelling outputs, preparing high-quality technical reports and client deliverables.

·    Interpret data to assess the impact of upstream activities, growth, climate, network constraints and operational conditions on wastewater systems.

·    Review survey, rainfall, flow, SCADA, EDM, CCTV and asset data to determine model confidence and fitness for use.

·    Support client discussions, technical queries, option appraisal and evidence-based decision-making.

·    Ensure technical assumptions, model limitations, reviewer comments and agreed changes are properly documented.

Essential experience

·    Extensive experience in wastewater network modelling within consultancy, utility or infrastructure environments.

·    Strong proficiency in InfoWorks ICM and wastewater modelling workflows, standards and quality processes.

·    Proven ability to lead projects, provide technical direction and review complex model outputs and deliverables.

·    Strong understanding of wastewater planning, storm overflow reduction, drainage area planning, growth assessment and network resilience.

·    Excellent communication, stakeholder management and technical report-writing skills in English.

·    Ability to mentor staff, build capability and operate effectively across international project teams and time zones.

Desirable experience

·    Experience supporting UK, Ireland, Australia, New Zealand or other international water industry projects.

·    Strong understanding of UK water industry regulations, AMP cycles, Uisce Eireann / Irish Water standards, Welsh MBV or comparable client frameworks.

·    Experience contributing to bids, framework delivery, technical standards, modelling guidance or standard operating procedures.

·    Experience with 1D / 2D modelling, river, pluvial or integrated catchment modelling using HEC-RAS, TUFLOW, Flood Modeller Pro or similar tools.

·    Chartered status, professional registration or active progress towards recognised professional qualification would be beneficial.