Principal Wastewater (Hydraulic) Modeller

Tetra Tech Europe; Glasgow; Hybrid; GBP 40,000 - 65,000; Full time

Job summary

Tetra Tech Europe is seeking a Principal Wastewater Modeller to build a high-performing team for wastewater hydraulic modelling in Glasgow or Edinburgh. You will drive technical delivery across major UK frameworks, define catchment strategies, and ensure quality standards.

This role offers hybrid working with expected site visits for technical delivery and stakeholder engagement. The ideal candidate will have a relevant degree and experience with tools like InfoWorks ICM, GIS, and Python.

Qualifications

• Proven expertise in hydraulic modelling and delivery of catchment strategies.
• Ability to produce auditable modelling outputs maintaining strong quality.
• Experience managing forecasts and commercial risk.
• Track record of leading multidisciplinary teams effectively.
• Ability to drive improvement using digital tools.

Responsibilities

• Lead technical delivery across major UK frameworks.
• Define catchment strategies and ensure robust governance standards.
• Strengthen modelling assurance and influence investment decisions.
• Develop and mentor a capable modelling team.
• Support bids and proposals with water companies.

Skills

Hydraulic modelling leadership

Technical assurance and governance

Commercial and programme performance

Team leadership and client engagement

Digital innovation and data fluency

Education

Degree in a relevant technical discipline

Postgraduate qualification

Tools

InfoWorks ICM

GIS

Python

FME

Power BI

Job description

Lead wastewater modelling that shapes resilient communities across Scotland and the UK

Purpose And Scope Of The Role

Tetra Tech’s Water Consultancy is seeking a Principal Wastewater Modeller to build and lead a high‑performing team of Wastewater Hydraulic Modellers, based in either Glasgow or Edinburgh. You will lead technical delivery across major UK frameworks, including Scottish Water, from feasibility through to detailed design. The role will involve defining catchment strategies, directing hydraulic modelling and design inputs, and ensuring robust HSE, quality and governance standards across multi‑million‑pound wastewater programmes. Day to day, you will manage modelling standards, commercial performance, resource planning and risk, while supporting bids, proposals and client engagement with water companies and delivery partners.

Your Impact In This Position

In the short term, you will strengthen modelling assurance and guide complex catchment interventions. Over time, you will develop and mentor a capable modelling team, improve workflows and help influence investment decisions that reduce pollution and flood risk. Longer term, you will have the opportunity to apply digital tools to improve delivery, and lead low‑carbon, resilient solutions on significant wastewater programmes.

Core Capabilities

• Hydraulic modelling leadership – Proven expertise in InfoWorks ICM, model development, calibration and the delivery of robust catchment strategies across wastewater networks and frameworks.
• Technical assurance and governance – Ability to produce auditable, compliant modelling outputs while maintaining strong quality, HSE and governance controls.
• Commercial and programme performance – Experience managing forecasts, commercial risk, resources and contribution to bid and proposal development.
• Team leadership and client engagement – Track record of leading, mentoring and growing multidisciplinary teams, while communicating complex findings clearly to clients and stakeholders.
• Digital innovation and data fluency – Ability to drive improvement using GIS, Python, FME, Power BI or similar tools to automate workflows and support evidence‑based decisions.

Skills, Qualifications And Experience

A degree in a relevant technical discipline is essential; a postgraduate qualification is desirable. Chartered status, or working towards chartership, is preferred, along with professional affiliation with CIWEM, ICE or IWater.

Work patterns and locations:

This role is based in either Glasgow or Edinburgh, with hybrid working supported. Regular office, client and site visits will be expected to support collaboration, technical delivery and stakeholder engagement. Flexible working arrangements can be considered to help balance focused technical work with team and client interaction.

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.