Modeller

Job Overview

We are looking for a wastewater hydraulic modeller to support and enhance our team. You will be joining a dynamic multi‑disciplinary technical delivery team working on a wide variety of projects with local clients across Wales and Southwest England. These include catchment scale wastewater modelling and design projects, delivering WINEP/NEP and storm overflows investment to improve rivers and coastal waters across the region.

As part of this team you will deliver a wide variety of projects, and see your solutions developed from start to finish. We live our Strategy every day "sustainability is everything" and we actively promote, prioritise and deliver nature‑based solutions.

You will have the opportunity to deliver wastewater network modelling projects across the entire design process. You will use 1D hydraulic models for risk analysis and the development of solutions to improve water quality and reduce flood risk, with particular focus on storm overflows and wastewater treatment works across Wales and Southwest England.

As part of this, you will also develop wastewater catchment survey specifications and investigations, liaise with and manage survey sub‑contractors, and spend time on site during the project lifecycle.

You will be part of our Modelling Centre of Excellence and embedded in our global training programme. You will also be part of our local multi‑disciplinary expert water team, delivering holistic catchment solutions with a strong focus on nature‑based solutions. This will include developing technical reports, hydraulic model build and analysis, business case development, multi‑capitals economics, supporting calculations, and other key modelling deliverables.

In addition, you will work closely with clients and present modelling and project outputs to their Operations, Asset Management, Environmental, and Modelling teams.

• Practical experience in hydraulic modelling techniques within the UK water industry, specifically using Info Works ICM, ideally including Level 1 UPM water quality modelling
• Degree (or equivalent) in Engineering, Geography, Environmental Science, or a related discipline, with progress toward chartership with an appropriate professional body
• Proven track record of successfully delivering water projects in the UK, including collaboration with both public and private sector clients and regulatory bodies

*** Unfortunately, we are unable to offer visa sponsorship for this role. Applicants must have the right to work in the UK at the time of application and for the duration of employment. Any offer made will be subject to satisfactory proof of immigration status.***

At Arup we care about each member's success, offering an attractive total reward package that recognises contributions. In addition to competitive, fair and equitable pay, you will enjoy a career where you can belong, grow and thrive through benefits that support health and wellbeing, a wide range of learning opportunities and many possibilities to have an impact.

We also provide Private medical insurance, Life assurance, Accident insurance and Income protection cover, as well as flexible benefits to help you look after all aspects of your wellbeing.

Arup is an equal opportunity employer that actively promotes and nurtures a diverse and inclusive workforce. We welcome applications from individuals of all backgrounds, regardless of age, gender identity or expression, marital status, disability, neurotype or mental health, race or ethnicity, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave. We are an open environment that embraces diverse experiences, perspectives, and ideas – this drives our excellence.

We are committed to making our recruitment process and workplaces accessible to all candidates. Please let us know if you need any assistance or reasonable adjustments throughout your application or interview process, or to perform the essential functions of the role.

Closing Date: 30.06.2026