Joining Arup
Arup’s purpose, shared values and collaborative approach has set us apart for 80 years, guiding how we shape a better world. We work across the entire water cycle, with utilities, local and regional governments, commercial and domestic water users and other partners. From designing and maintaining key water infrastructure to advising on natural catchments and flood defences, we help clients to consider the long-term economic, environmental and social dimensions of their proposals.
The Opportunity
We are looking for a senior or principal wastewater hydraulic modeller to play a key role in our dynamic multi-disciplinary technical delivery team who work 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.
You will become a key leader in our global modelling centre of excellence in Cardiff/Bristol/Birmingham and will lead a team of junior modellers while also having the opportunity to develop overseas teams across our global business. Our framework wins for AMP8 position us to work across the entire design process including strategic planning, feasibility, detailed design and design and build support. You will lead on 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.
We are passionate about our people; Every person is guided and mentored in their career path and encouraged to work towards being the best that they can be. Every year we invest in our people to allow them to pursue new ideas, and to develop a forward-thinking team at the forefront of innovation.
At Arup, we invest in our own bespoke research every year, often working in partnerships, to develop our knowledge, author industry guidance, and build digital tools and products. You will be encouraged to lead on this research as part of our global modelling centre of excellence in the West working alongside civil engineers, digital specialists and expert modellers in a truly blended team environment.
Is this role right for you?
You will have the opportunity to lead wastewater network modelling projects across the entire design process. You will use 1D hydraulic models for detailed risk analysis and development of solutions to improve water quality and reduce flood risk with particular focus on storm overflows and wastewater treatment works across the region. There will also be opportunities to work on international water projects supporting Arup’s global water business in locations such as Manila, India, Australia plus North and South America.
You will be key leader in our modelling centre of excellence and will help lead our global training programme. You will 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. You will also be encouraged and supported to develop and apply digital tools to enhance, optimise and automate our offering. You will be supported and trained in all of the above, and more. You will also work very closely with our client, building up long lasting relationships their Operations, Asset Management, Environmental and Modelling teams.
We are looking for qualifications, skills and knowledge in the following:
Strong skills in hydraulic modelling techniques within the UK water industry, specifically using InfoWorks ICM , ideally including Level 1 UPM water quality modelling.
Degree (or equivalent) in Engineering, Geography, Environmental Science, or a related discipline, chartered with an appropriate organisation
A proven track record of successfully delivering water projects in the UK, including collaboration with private/public sector clients and regulators.
Strong client relationship management skills. Confidence in presenting results, challenges and proposals in a productive, collaborative working environment.
Development of digital tools to enhance, optimise and automate our offering
Not ready to apply just yet, or have a few questions? Contact [email protected] . Please note, to ensure we remain GDPR compliant do not send your CV directly to us via this email.
What we offer you
At Arup, we care about each member’s success, so we can grow together.
Guided by our values, we provide an attractive total reward package that recognises the contribution of each of our members to our shared success. As well as competitive, fair and equitable pay, we offer a career in which all our members 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 through the work they do.
We are owned in trust on behalf of our members, giving us the freedom, with personal responsibility, to set our own direction and choose work that aligns with our purpose and adds to Arup’s legacy. Our members collaborate on ambitious projects to deliver remarkable outcomes for our clients and communities. Profit Share is a key part of our reward, enabling members to share in the results of our collective efforts.
We also provide Private medical insurance, Life assurance, Accident insurance and Income protection cover. In addition, you’ll have access to flexible benefits to help you look after all aspects of your wellbeing and give you the freedom and flexibility to find the best solutions for you, your family, and your individual needs.
Different people, shared values
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 (within legal limits), 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.
Guided by our values and alignment with the UN Sustainable Development Goals, we create and contribute to equitable spaces and systems, while cultivating a sense of belonging for all. Our internal employee networks support our inclusive culture: from race, ethnicity and cross-cultural working to gender equity and LGBTQ+ and disability inclusion – we aim to create a space for you to express yourself and make a positive difference. Discover more about life at Arup at www.arup.com/careers/your-life-at-arup
We are committed to making our recruitment process and workplaces accessible to all candidates. Please contact [email protected] to let us know if you need any assistance or reasonable adjustments throughout your application or interview process, and/or to perform the essential functions of the role. We will do everything we can to support you.
Our Application Process
To understand what to expect next, please visit https://www.arup.com/careers/arup-careers-uk-application-process
All applications will be considered, and we will make every effort to respond within 72 hours of receipt. Please note that response times may be subject to delays during the festive period.
Stay safe online – Arup will never ask for your bank details as part of our recruitment process.
Recruitment Agencies - We have a Preferred Supplier List of trusted partners to assist us when required and do not acknowledge any speculative CVs or unsolicited candidate introductions from agencies not on the list. @WaterWest
Closing Date: 23.07.2026
We may close the role earlier than the advertised date should we receive a large number of applications, so please ensure you apply early.
@WaterWest
