Senior Wastewater; Hydraulic Modeller

Lead hydraulic modelling that protects communities Purpose and scope of the role:

Tetra Tech’s Water Consultancy is seeking a Senior Wastewater Hydraulic Modeller to join our growing Water Consultancy and deliver hydraulic modelling and catchment strategies across AMP8 and AMP9 programmes. You will develop and quality‑assure hydraulic solutions from feasibility through to outline and detailed design, lead small project teams and provide technical direction on urban drainage, DWMPs, WINEP and catchment investment planning.

Locations include London, Leeds, Newcastle, Sheffield, Derby, Edinburgh, Glasgow and Warrington; hybrid working is standard.

You will immediately strengthen modelling assurance and solution delivery for high‑profile wastewater programmes. In the medium term you will lead multidisciplinary teams, improve modelling workflows and influence investment decisions that reduce pollution and flood risk. Longer term you can progress to technical lead or programme roles, shaping standards and digital capability across national frameworks.

• Hydraulic modelling leadership - Proven expertise building, calibrating and interpreting Info Works ICM models to derive robust catchment strategies.
• Solution development & design input - Ability to translate model outputs into outline and detailed designs, options appraisal and clear implementation plans.
• Quality, governance & standards - Track record of producing compliant, auditable modelling reports and maintaining governance across project portfolios.
• Team leadership & client engagement - Experience leading technical teams, mentoring modellers and presenting complex findings to clients and stakeholders.
• Digital tools & data fluency - Advanced Excel and Power BI skills; familiarity with GIS, Python, FME or Optimatics is advantageous.

Expected: degree in a relevant technical field; demonstrable Info Works ICM experience. Desirable: postgraduate qualification, chartership or working towards it and professional affiliation (CIWEM, ICE, IWater).

Hybrid working with regional office presence and regular site or client visits as required. Flexible arrangements supported to balance collaboration and focused modelling work.

In alignment with the Equality Act 2010, we will make reasonable adjustments to support candidates and employees requiring additional arrangements. Please inform us if you need any accommodations during the recruitment process or in your day-to-day role.