Location
Sheffield with hybrid working options available. Offices also located in London, Leeds, Newcastle, Sheffield, Derby, Edinburgh, Glasgow and Warrington. Flexible working arrangements supported.

Hours
Full Time - Flexible working patterns supported.

Salary
Negotiable

About the Role
Tetra Tech’s Water Consultancy is seeking experienced Wastewater Hydraulic Modellers to join our team delivering AMP8 and AMP9 programmes across the UK. You will construct, maintain and quality-assure wastewater models, deliver feasibility assessments and develop outline and detailed design solutions for urban drainage, Drainage and Wastewater Management Plans (DWMPs), Water Industry National Environment Programme (WINEP) and catchment investment projects. Day-to-day you will work within multidisciplinary teams, manage small projects, engage directly with clients and handle large datasets that inform multi-million-pound delivery programmes.

Your impact in this position will be immediate, improving the robustness of modelling outputs used to prioritise investment and reduce pollution risk. Over time you will lead technically complex modelling workstreams, influence design and intervention choices, and build trusted client relationships. Longer term, there are clear routes to senior modelling, technical lead or programme roles where you will help set modelling standards and contribute to strategic planning across national frameworks.

Core capabilities include:
- Urban drainage modelling proficiency: Expert in building and calibrating InfoWorks ICM models, interpreting results and applying best practice to network assessments.
- Data handling & analysis: Confident managing large datasets, performing time-series analysis and producing clear evidence to support decisions.
- GIS & spatial intelligence: Proficient with MapInfo, ArcGIS or QGIS to integrate spatial data, support model inputs and create client deliverables.
- Technical delivery & quality assurance: Produce rigorous feasibility studies, design inputs and compliant modelling reports with strong attention to validation and traceability.
- Collaboration & client engagement: Able to manage small projects, present findings to clients and work effectively within multidisciplinary project teams.

Experience
Proven experience in wastewater hydraulic modelling, particularly with InfoWorks ICM. Confident in managing large datasets and performing time-series analysis. Experience working within multidisciplinary teams and managing small projects is essential.

About you
Strong communicator with the ability to engage clients and collaborate effectively. Detail-oriented with a commitment to quality assurance and validation. Motivated to develop technically complex modelling workstreams and contribute to strategic planning. Flexible and adaptable to hybrid working environments.

Qualifications
Degree in a relevant technical field is expected. Strong competence in Excel is required. Postgraduate qualification and chartership or working towards chartership are desirable.