Wastewater (Hydraulic) Modeller

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Tetra Tech is seeking an experienced Wastewater Hydraulic Modeller to join its Water Consultancy team and support AMP8 and AMP9 programmes. You will build, maintain and quality-assure InfoWorks ICM models, deliver feasibility studies and design inputs for urban drainage, DWMPs and catchment investments, while working with teams on large datasets. Your impact ranges from immediate improvement in modelling robustness to leading complex workstreams and client relationships with routes to senior roles. Requirements include a degree in a relevant field and strong Excel; postgraduate qualification and chartership are desirable. To apply, tailor your CV to showcase InfoWorks ICM, data analysis, GIS, client engagement and collaborative project delivery, and note your hybrid work preferences across London and other offices.

Wastewater (Hydraulic) Modeller

Shape urban drainage resilience

Purpose and scope of the role:

Tetra Tech’s Water Consultancy is seeking experienced Wastewater Hydraulic Modellers to join our Water Consultancy 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, DWMPs, 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:

You will immediately improve the robustness of modelling outputs used to prioritise investment and reduce pollution risk. Over the medium term 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:

• 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.

Skills, qualifications and experience: 

Expected: degree in a relevant technical field; strong Excel competence. Desirable: postgraduate qualification and chartership or working towards chartership.

Work patterns & locations:

Hybrid working with offices in London, Leeds, Newcastle, Sheffield, Derby, Edinburgh, Glasgow and Warrington. Flexible arrangements supported.

#LI-MM1 #Water

Why join Tetra Tech?

Tetra Tech is a leading provider of consulting and engineering services working across the full project lifecycle worldwide. We have a wide range of expertise across our teams, providing a global support network with a personalised approach to client relationships to better understand where we can add value. We provide a collaborative environment that supports individual performance, innovation, and creativity.

We support public and private sector clients on local, national, and international projects to deliver sustainable and resilient solutions. Our operations in the UK, Ireland, and the Netherlands include more than 6,000 employees who are Leading with Science® to solve our clients’ most complex problems.

In alignment with the Equality Act 2010, we will make reasonable adjustments to support candidates and employees requiring additional arrangements. This could include adaptations to work schedules, training approaches, or the physical workspace. Please inform us if you need any accommodations during the recruitment process or in your day-to-day role.