Purpose and Scope of the Role
You will sit at the centre of Tetra Tech’s Water Consultancy, providing statistical leadership across multiple clean‑water analysis and forecasting projects. Day‑to‑day, you will define and audit statistical approaches, advise analysts and modellers on non‑parametric and probabilistic methods, prepare and review client outputs, and ensure consistency with regulatory reporting. You will work within multidisciplinary teams on AMP8/AMP9 programmes, influencing modelling practice across project portfolios that inform investment and delivery decisions.
Your Impact in This Position
In the short term, you will improve rigour and consistency in modelling outputs and reporting. Over the medium term, you will embed preferred statistical workflows, mentor the analytics team and support clients in adopting best practices.
Core Capabilities
* Statistical methodology – deep knowledge of non‑parametric methods, lognormal and binomial distributions, robust outlier identification and confidence interval interpretation.
* Probabilistic & predictive modelling – practical experience with probabilistic techniques, regression and machine‑learning approaches applied to time‑series and water‑industry data.
* Audit & assurance – ability to audit statistical and modelling processes, validate code and model outputs, and maintain traceable reporting standards.
* Communication & mentoring – translate complex statistical reasoning into clear guidance, prepare client‑facing reports and mentor analysts in appropriate method selection.
* Technical interoperability – familiarity with Python, Excel macros and data workflows; aptitude for working with model code, data pipelines and regulatory reporting formats.
Qualifications And Training
Expected: degree in statistics, mathematics, engineering, epidemiology, natural sciences or related discipline.
Desirable: postgraduate qualification and membership, or working towards membership, of a relevant professional body.
Work Patterns & Locations
Hybrid role with regional UK locations; typical office attendance 2–3 days per week and regular client engagement. Flexible working is considered to support delivery and development.
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.
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