Principal Water Quality Scientist Modeller jobs in Cardiff – Browse 23 openings on RoboApply Jobs

Principal Water Quality Scientist Modeller jobs in Cardiff

Open roles matching “Principal Water Quality Scientist Modeller” with location signals for Cardiff. 23 active listings on RoboApply Jobs.

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companyAECOM logo
Full-time|On-site|Cardiff

Join AECOM as a Principal Water Quality Scientist/Modeller in Cardiff, where you will play a pivotal role in advancing water quality initiatives. As a leader in this field, you will utilize your expertise to analyze, model, and propose innovative solutions to complex water quality challenges. This position offers a unique opportunity to collaborate with multidisciplinary teams, contributing to sustainable water management projects that positively impact communities.

Apr 9, 2026
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companyAECOM logo
Full-time|On-site|Cardiff

Begin your journey. Flourish with us.“Are you eager to collaborate with a team of flood risk experts and influence the future of the Water Sector?”Our Water division is seeking a dedicated Senior Flood Modeller to become an integral part of our vibrant and expanding Water Business Line. This role offers the opportunity to contribute to high-profile and impactful projects throughout the UK and beyond, all while being at the center of one of the UK’s most ambitious and interconnected engineering hubs.As a senior technical resource, you will play a pivotal role in mentoring our junior team members and actively enhancing our services for local authorities, water companies, and both public and private sector clients.Your responsibilities will include:Creating and validating hydraulic models using software tools such as Flood Modeller, TUFLOW, Mike 11, Mike 21, HEC-RAS, and ICM to support the design of Flood Alleviation Schemes, conduct Flood Risk Assessments, and perform reservoir flood studies.Developing water quality models, which may involve physico-chemical, biological, bacterial, or chemical factors using industry-standard software like MIKE, Delft3D, SIMCAT, and/or ICM.Conceptualizing and scoping modelling methodologies, assessing risks and opportunities in each case.Conducting and reviewing hydrological assessments, including Flood Estimation Handbook, ReFH2, and WINFAP.Leading efforts on tenders ranging from innovative one-off projects to multimillion-pound framework contracts.Guiding team members to facilitate their professional growth.Building strong relationships with clients and across various technical disciplines.Staying abreast of legislative developments and guidelines that may impact our services.Utilizing AECOM’s project management systems to ensure the delivery of high-quality outputs to our clients, within the agreed timelines and budget.Collaborating closely with clients and teams of engineers and technical specialists to support a diverse range of flood risk management projects, including fluvial, coastal, surface water, and drainage.If you have a passion for innovation and a desire to transform visionary ideas into reality, AECOM welcomes you. Join our team, where we don't merely construct infrastructure; we uplift communities and enhance lives. Follow our AECOM Water page on LinkedIn to stay updated on the significant projects we're undertaking and witness the positive impact we're making in the industry!Grow with us.Become part of our dynamic Water business, consisting of around 700 experts across the UK & Ireland. Work alongside top engineers and consultants to deliver a wide array of engaging projects, from small initiatives to large-scale endeavors.

Mar 5, 2026
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companyAECOM logo
Full-time|On-site|Cardiff

We are seeking a talented and experienced Principal Structural Engineer specializing in water engineering to join our dynamic team in Cardiff. In this role, you will lead the design and implementation of innovative structural solutions for water infrastructure projects. You will collaborate with multidisciplinary teams to ensure the highest standards of safety and sustainability are met.

Jan 14, 2026
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companyAECOM logo
Full-time|Hybrid|Cardiff

Embark on your journey with us and thrive.“Are you prepared to join a team of wastewater modellers and contribute to the transformation of the Water Industry?”Become an integral part of our innovative and multidisciplinary Water Team as a Senior Wastewater Hydraulic Modeller. This role offers the flexibility of being based in any of our UK or Ireland offices while embracing our adaptable hybrid working model.As a pivotal contributor, you will play a crucial role in executing significant water projects across the UK and internationally. We facilitate the development of crucial flood mitigation strategies, pollution control measures, and infrastructure initiatives, providing you with diverse experiences that will be essential for your ongoing professional development. Our modelling team is fully integrated with broader project teams, ensuring collaboration with experts from various disciplines to devise comprehensive solutions.As a recognized leader in Blue-Green infrastructure and nature-based solutions, we partner with a variety of public and private sector clients including Severn Trent, Anglian Water, Northern Ireland Water, the Environment Agency, LLFAs, and other infrastructure providers. Our offerings encompass Flood Risk Assessments, Drainage Strategies, Outline Business Cases, hydraulic models, and detailed designs. We establish industry benchmarks by providing advice and developing guidelines that set best practices, positioning AECOM at the forefront of the water sector. This role presents a remarkable opportunity to collaborate with a talented and diverse team dedicated to innovation, cooperation, and efficiency.Your Responsibilities:Model Development: Construct hydraulic models, verify sewer networks, facilitate integrated model development, and support project planning including flow survey verification and the creation of catchment-scale strategic solutions for flood and pollution risks.Technical Innovation: Drive the implementation of new technologies, solve complex problems for our clients, and develop project scopes and tender responses.Effective Communication: Prepare and present technical reports and documentation to convey modelling results clearly, utilizing strong communication skills.Team Leadership: Mentor and assist team members in their professional growth while nurturing positive client relationships.Quality Assurance: Review hydraulic models, calculations, and technical reports to ensure high-quality delivery and compliance with modelling standards.If you are passionate about driving innovation and turning ambitious ideas into reality, AECOM welcomes you to our team where we not only construct infrastructure but also uplift communities.

Mar 2, 2026
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companyAECOM logo
Full-time|On-site|Cardiff

Kickstart your journey. Flourish with us.“Are you eager to become part of a team of flood risk experts and contribute to the evolution of the Water Sector?”Our Water division is actively seeking a dedicated Coastal Modeller to join our vibrant and expanding Water Business Line. This is your opportunity to engage in prominent, impactful projects throughout the UK and beyond, while being situated at the core of one of the UK’s most ambitious and interconnected engineering hubs in the north.In this role, you will be instrumental in developing resilient, sustainable solutions for communities, infrastructure, and the environment. Each day brings new challenges, presenting you with ample chances to innovate, collaborate, and grow within a team that thrives on diversity.Your responsibilities will include:Conducting modelling studies for various projects, from feasibility assessments to detailed design phases.Collaborating with interdisciplinary teams to ensure successful delivery of modelling studies.Assisting in the development, configuration, and application of numerical models.Supporting senior team members in project execution, including data analysis and reporting.Ensuring tasks are completed within established budgets, timelines, and quality benchmarks.Contributing to the creation of technical reports and project documentation.Engage with internal teams and, when necessary, assist in communication with clients and stakeholders. Continue to enhance your technical expertise within the coastal modelling sector. If you are passionate about innovation and translating bold concepts into reality, AECOM invites you to join us. Here, we not only build infrastructure but also elevate communities and improve lives. Follow our AECOM Water page on LinkedIn to stay informed about the impactful projects we’re undertaking and witness the difference we’re making in the industry!Grow with us.Become a part of our dynamic Water division, which comprises approximately 600 experts across the UK & Ireland. Work alongside leading engineers and consultants to deliver a diverse array of projects, from small initiatives to large-scale endeavors, guiding them from conception to realization.At AECOM, you will thrive in an inclusive and forward-thinking environment where your contributions are recognized. Enjoy an array of core and personalized benefits tailored to support your future and well-being, fitting your lifestyle. Benefit from career development opportunities, access to technical practice networks, AECOM University, volunteer days, and our flexible hybrid working model to help maintain a work-life balance that suits you. We appreciate that everyone’s circumstances vary, so we welcome discussions regarding part-time or flexible working arrangements.

Mar 17, 2026
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companyAECOM logo
Full-time|On-site|Cardiff

Begin your journey with us. Cultivate your career here. “Are you prepared to be part of a dedicated team of flood risk specialists, influencing the future of the Water Industry?” We are seeking a Principal or Associate to enhance our expanding Water team. In this senior technical position, you will lead teams in delivering impactful real-time flood forecasting projects while contributing to the growth of our services in collaboration with the Environment Agency and other stakeholders.Your primary focus will be on flood forecasting, with opportunities to engage in hydrology and non-real-time modelling projects as well.Your responsibilities will include:Creating and evaluating Flood Forecasting Inception Stage Reports, including assessing existing models and hydrometric data quality.Developing, calibrating, and validating flood forecasting models (e.g., PDM, Flood Modeller).Conducting non-real-time modelling and hydrological analysis utilizing tools such as Flood Modeller, ICM, HEC-RAS, MIKE 11, and FEH hydrological methods.Producing and reviewing comprehensive technical reports, documenting model creation and associated uncertainties.Leading and contributing to proposals for key clients.Mentoring and supporting team members in their professional growth.Building strong relationships with clients and colleagues across various disciplines.Staying informed about relevant legislation and guidelines affecting our services.Utilizing AECOM’s project management systems to ensure timely and budget-compliant delivery of high-quality outputs.Join our dynamic Water business, which consists of around 700 experts across the UK and Ireland. Collaborate with leading engineers and consultants on a diverse array of exciting projects, ranging from small initiatives to large-scale ventures, from concept to completion.If you are passionate about innovation and bringing visionary ideas to life, we want to hear from you! Connect with our AECOM Water page on LinkedIn to stay informed about the impactful projects we’re working on and witness the difference we’re making in the industry!Join us and grow together.

Mar 17, 2026
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companyAECOM logo
Full-time|On-site|Cardiff

AECOM is seeking a Principal Mechanical Engineer specializing in the water sector to join our dynamic team in Cardiff. In this pivotal role, you will leverage your extensive expertise in mechanical engineering to design and oversee projects that enhance water infrastructure and contribute to sustainable practices. You will collaborate with multidisciplinary teams to deliver innovative solutions while ensuring compliance with industry standards.

Mar 30, 2026
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companyAECOM logo
Full-time|Hybrid|Cardiff

Kickstart your career and elevate your professional journey with us!“Are you prepared to join a dedicated team of hydrologists and influence the future of the Water Industry?”Become a pivotal member of our innovative and interdisciplinary Water Team as a Principal Hydrologist. This role allows you to work from one of our UK or Ireland offices while benefiting from our flexible hybrid working model.As a Principal Hydrologist, your expertise will be instrumental in delivering significant water projects both domestically and internationally. You will spearhead hydrological assessments that guide flood risk management, major infrastructure planning, water resource strategies, and environmental permitting.This senior position entails a blend of technical proficiency, client interaction, project management, and team leadership within an expanding water division.Your responsibilities will include:Leading hydrological assessments to facilitate flood risk evaluations, infrastructure design, catchment strategies, and environmental impact assessments.Providing technical guidance on rainfall-runoff modeling, river flow estimation, climate change considerations, and catchment analysis.Supervising and reviewing hydrological modeling results to ensure quality, precision, and adherence to UK regulatory guidelines.Serving as the technical lead on significant frameworks and multidisciplinary projects spanning the transport, energy, water, and development sectors.Advising clients on flood risk policies, drainage strategies, abstraction licensing, and environmental permitting needs.Mentoring and developing junior hydrologists, promoting technical excellence and knowledge exchange.Supporting business development initiatives, including bid preparation and client relationship management.If you are driven by innovation and eager to transform bold ideas into reality, AECOM invites you to join our team. We are committed to not just constructing infrastructure but also uplifting communities and enhancing lives. Follow our AECOM Water page on LinkedIn to stay informed about the impactful projects we are executing and witness the difference we are making in the industry!Embrace growth with us.Become an integral part of our vibrant Water division, which comprises approximately 600 experts across the UK and Ireland. Collaborate with leading engineers and consultants to deliver a wide range of engaging projects, from small initiatives to substantial undertakings, from inception to completion.At AECOM, you will thrive in an inclusive and progressive environment where your contributions are appreciated. Enjoy a variety of core and personalized benefits tailored to support your future and well-being, suited to your lifestyle. Take advantage of career development opportunities, technical practice networks, AECOM University, volunteer days, and our flexible hybrid working model to ensure a work-life balance that fits your needs.

Mar 3, 2026
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companyAECOM logo
Full-time|Hybrid|Cardiff

Begin your journey with us. Advance your career with AECOM.Are you eager to contribute to transformative water infrastructure projects?Join our dynamic and diverse Water team as a Project Manager in our expanding Cardiff office. Enjoy the advantages of our flexible hybrid working model. At AECOM, we lead the way in innovation, executing a wide range of water programs and projects in collaboration with major UK water providers, including Wessex Water, Welsh Water, South West Water, Thames Water, Severn Trent Water, and Tier 1 Contractors.In this pivotal role, you will oversee various elements of small to medium-sized water utility projects, focusing on both wastewater and drinking water initiatives, primarily within long-term frameworks for key clients. This is an exceptional chance to join a talented team dedicated to efficiency and innovative solutions.Your key responsibilities will include:Leading and managing projects, ensuring successful delivery with full accountability for budget and schedule.Overseeing project contracts, ensuring adherence to scope, budget, and timelines.Managing change processes by documenting early warnings, preparing variations, and negotiating changes with clients.Developing and maintaining project timelines while identifying risks, dependencies, and required resources.Assessing and mitigating project risks and opportunities to guarantee successful results.Managing contracts using various forms, including NEC.Ensuring quality management processes are adhered to for all project activities and outputs.Engaging with stakeholders, managing their interests to achieve project objectives.Coordinating and managing multidisciplinary teams across the organization.Overseeing subcontractor and supply chain performance to meet project requirements.Building strong relationships with clients and cross-functional team members.Leading bid management for design tenders on standalone projects and framework contracts.If you are passionate about innovation and eager to turn ambitious ideas into reality, AECOM is the place for you. Join our team where we not only construct infrastructure but also uplift communities and enhance lives. Follow our AECOM Water page on LinkedIn to stay updated on our impactful projects and witness the difference we are making in the industry!Join Us and Make a Difference.Become part of our vibrant Water business, which includes around 600 experts across the UK and Ireland. Collaborate with leading civil, mechanical, electrical, and process engineers to deliver a variety of engaging projects, from small initiatives to large-scale ventures, from conception to completion. At AECOM, you'll thrive in an inclusive and forward-thinking environment where your contributions are valued.

Mar 2, 2026
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companyAECOM logo
Full-time|On-site|Cardiff

Join AECOM as a Water Geospatial Lead, where you will play a pivotal role in leading geospatial projects across the UK and Ireland. In this position, you will leverage your expertise in geospatial technologies to enhance water resource management and contribute to sustainable development initiatives. You will collaborate with a dynamic team of professionals, driving innovation and delivering high-quality solutions to our clients.

Mar 25, 2026
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companyAECOM logo
Full-time|On-site|Cardiff

Join our dynamic team at AECOM as a Mechanical Engineer specializing in water projects! In this role, you will be instrumental in designing and implementing innovative solutions for a variety of water infrastructure projects. Your expertise will contribute to sustainable practices while ensuring compliance with industry standards and regulations. Collaborate with a talented team of professionals and advance your career in a supportive environment.

Mar 30, 2026
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companyMonzo Bank Ltd. logo
Senior Data Scientist

Monzo Bank Ltd.

Full-time|Remote|Cardiff, London or Remote (UK)

Join the dynamic team at Monzo Bank as a Senior Data Scientist, where you will leverage your expertise to drive data-driven decision-making and enhance our innovative banking solutions. You will be at the forefront of transforming complex data into actionable insights, collaborating closely with cross-functional teams to improve our products and services.

Feb 27, 2026
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companyAECOM logo
Full-time|Hybrid|Cardiff

Begin Your Journey with Us. Advance Your Career Here.Are you prepared to join a team that is redefining the future of water infrastructure?Become a part of our pioneering and multidisciplinary Water team as a Senior Project Manager, located in our expanding Cardiff office. Our flexible hybrid working model allows you to balance your professional and personal life. At AECOM, we excel in innovation, managing a diverse array of water initiatives and projects through enduring partnerships with leading clients, including significant UK water companies such as Wessex Water, Welsh Water, South West Water, Thames Water, Severn Trent Water, along with Tier 1 Contractors.As a Senior Project Manager, you will spearhead various elements of several small to medium-sized water utility projects, focusing on both wastewater and potable water systems, mainly within the frameworks of key client partnerships. This is a remarkable chance to collaborate with a talented and diverse group committed to delivering efficient and forward-thinking solutions.Key Responsibilities:Senior Project ManagerSupervise the activities of one or more Project Managers, providing assistance as necessary for their tasks.Contribute to the continuous enhancement of project delivery procedures and their implementation.Promote uniform Project Manager (PM) practices and procedures in accordance with AECOM PM standards and the Project Delivery System (PDS).Depending on regional and project needs, you may also manage more complex projects independently.If you are passionate about innovation and eager to transform ambitious ideas into reality, AECOM is eager to welcome you. Join our team where we not only create infrastructure but also enrich communities and improve lives. Follow our AECOM Water page on LinkedIn to stay informed about the impactful projects we are undertaking and witness the difference we are making in the industry!Grow with Us.Become a vital member of our dynamic Water division, which includes around 600 specialists throughout the UK and Ireland. Collaborate with leading civil, mechanical, electrical, and process engineers to deliver a spectrum of engaging projects, from small initiatives to large-scale undertakings, from inception to completion. Here, you will flourish in an inclusive and progressive environment where your contributions are valued.Enjoy the Benefits.At AECOM, we offer a variety of core and personalized benefits crafted to support your future and well-being, tailored to fit your lifestyle. Experience career development opportunities, our flexible hybrid working model to maintain a work-life balance that suits you, technical practice networks, AECOM University access, and volunteering days. We appreciate that everyone’s circumstances differ, so we are more than willing to discuss part-time or flexible working arrangements.

Mar 5, 2026
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companyAECOM logo
Full-time|On-site|Cardiff

Join us as the Head of Design & Build for the Water sector in the UK & Ireland at AECOM. In this pivotal role, you will lead innovative projects that shape the future of water infrastructure, ensuring sustainability and efficiency at every stage. You will collaborate with multi-disciplinary teams, driving design excellence and operational effectiveness.Your leadership will inspire our teams to deliver outstanding results while adhering to industry standards and best practices. This position requires a strategic thinker with a passion for delivering high-quality projects that meet client expectations and enhance community well-being.

Apr 13, 2026
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companyAECOM logo
Full-time|On-site|Cardiff

Role overview The Principal Mechanical Engineer at AECOM’s Cardiff office plays a key role in managing mechanical engineering projects across a range of sectors. This position involves providing technical leadership, directing project delivery, and making sure all work aligns with both industry standards and client requirements. Main responsibilities Lead mechanical engineering projects from initial concept to final completion Support and mentor a team of engineers, with a focus on developing junior staff Encourage collaboration with professionals from other disciplines to meet project objectives Drive ongoing improvements in engineering practices and project results

Apr 27, 2026
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companyMonzo logo
Full-time|£80K/yr - £95K/yr|Remote|Cardiff, London or Remote (UK)

Join us in our mission to make money accessible for everyone.We are revolutionizing the banking experience by moving away from the complexities of traditional banking.Starting as a prepaid card, our offerings have expanded significantly over the past decade in the UK. We now provide personal and business accounts, joint accounts, accounts for 16-17 year olds, a free kids account, and credit cards, with even more exciting features on the horizon. Our customers can also save, invest, and manage their pensions with us.With our vibrant coral cards and the get-paid-early feature, along with financial education via social media and our award-winning customer service, we have consistently created outstanding experiences for our users!At Monzo, it's not about selling products—it's about solving problems and transforming lives through innovative banking London | UK remote | £80,000 to £95,000 + Stock Options + Benefits | Hear from the teamAbout Our Data Science Team:We are seeking a Senior Product Data Scientist who is eager to help shape the future of banking. You will have the chance to significantly enhance our user engagement in 2025 and help create a bank that customers genuinely appreciate.At Monzo, we are building a banking platform that is equitable, transparent, and enjoyable to use. We are experiencing rapid growth with over 11 million customers in the UK, and over 80% of our growth is driven by word of mouth and referrals.Empower Monzo to Make Informed Decisions More Quickly

Feb 16, 2026
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companyMonzo logo
Full-time|£95K/yr - £130K/yr|Remote|Cardiff, London or Remote (UK)

Join us in our mission to revolutionize banking for everyone.We’re moving away from the complexities of traditional banking.Starting from a prepaid card, Monzo has significantly expanded its offerings over the past decade in the UK. We now provide a range of financial products including personal and business bank accounts, joint accounts, accounts for 16-17 year olds, a free kids account, and credit cards. Additionally, our UK customers can save, invest, and manage their pensions all in one place.With our signature hot coral cards and features like get-paid-early, complemented by financial education on social media and award-winning customer service, we have a proven track record of creating memorable experiences for our customers!At Monzo, we prioritize problem-solving and transforming lives rather than merely selling products London or Barcelona | UK Remote | £95,000 to £130,000 + Stock Options + Benefits| Technology - Data About Our Data Science Teams:We are on the lookout for a Lead Data Scientist who is eager to contribute to the creation of the bank of the future. This role presents an exciting opportunity to enhance our user engagement as we aim for 2025 and help us build a bank that our customers will truly adore.At Monzo, we are committed to building a bank that embodies fairness, transparency, and user-friendliness. Our rapid growth has led us to serve over 11 million customers in the UK, and more than 80% of our expansion is driven by word-of-mouth and referrals.Empower Monzo to Make Better Decisions, Faster

Feb 2, 2026
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companyMonzo Bank Ltd logo
Full-time|Remote|Cardiff, London or Remote (UK)

Monzo Bank Ltd is seeking a Principal Backend Engineer to drive the design and development of scalable systems for its banking platform. This role plays a key part in shaping the technical direction of Monzo’s backend, ensuring that solutions are reliable and meet high standards of quality. Key responsibilities Lead the design and implementation of backend systems that power Monzo’s platform Establish and uphold coding and architectural standards across engineering teams Mentor engineers and support their growth in delivering maintainable solutions Champion best practices in software development and system design Technical leadership The Principal Backend Engineer will provide guidance to teams, influencing both immediate projects and long-term engineering strategy. Setting high standards and promoting effective practices are central to this position. Location This role is open to candidates based in Cardiff, London, or working remotely within the UK.

Apr 27, 2026
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companyMonzo Bank Limited logo
Full-time|Remote|Cardiff, London or Remote (UK)

As a Senior Machine Learning Scientist at Monzo, you will play a pivotal role in driving our borrowing products forward. Collaborating closely with cross-functional teams, you will leverage advanced machine learning techniques to develop innovative solutions that enhance our customers’ experiences. Your expertise will guide the design and implementation of algorithms that improve risk assessment, credit scoring, and personalized lending strategies.

Mar 6, 2026
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companyMonzo logo
Full-time|Remote|Cardiff, London or Remote (UK)

Monzo seeks an Operations Manager with a focus on Quality Assurance. This position shapes how services are delivered and plays a key role in maintaining high standards across operations. The role is open to candidates based in Cardiff, London, or working remotely anywhere in the UK. Key responsibilities Lead quality assurance efforts to maintain and enhance product standards. Collaborate with teams throughout the company to spot and address areas for improvement. Oversee projects that promote ongoing operational excellence. Location This role can be based in Cardiff, London, or performed fully remotely within the UK.

Apr 28, 2026

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