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Principal Mechanical Engineer - Water Sector

AECOM

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 …

Mar 30, 2026

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Principal Mechanical Engineer

AECOM

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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Principal Structural Engineer - Water

AECOM

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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Mechanical Engineer for Water Projects

AECOM

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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Head of Design & Build, Water UK&I

AECOM

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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Principal Hydrologist at AECOM | Cardiff

AECOM

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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Principal Water Quality Scientist/Modeller

AECOM

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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Associate Director of Mechanical Engineering

AECOM

Full-time|On-site|Cardiff

Role overview The Associate Director of Mechanical Engineering at AECOM plays a key part in managing complex engineering projects from the earliest concept stages through to final delivery. The position combines direct technical leadership with hands-on involvement in project work, ensuring quality and consistency throughout each phase. What you will do Lead and mentor a team of mechanical engineers, offering guidance and support as projects progress. Oversee the design, execution, and delivery of projects, maintaining high standards at every step. Build and sustain strong working relationships with clients to support project success. Use expertise in mechanical systems to shape engineering solutions and project outcomes. Location This position is based in Cardiff.

Apr 27, 2026

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Project Manager - Water Infrastructure

AECOM

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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Principal Backend Engineer at Monzo | Remote (UK)

Monzo Bank Ltd

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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Water Geospatial Lead - UK & Ireland

AECOM

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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Senior Project Manager - Water Infrastructure

AECOM

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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Principal Flood Modeller

AECOM

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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Senior or Principal Civil Engineer - Infrastructure

Ramboll

Full-time|On-site|Cardiff

Join our dynamic team at Ramboll as a Senior or Principal Civil Engineer specializing in Infrastructure. In this pivotal role, you will leverage your extensive experience to shape the future of urban infrastructure projects. You will collaborate with multidisciplinary teams to deliver innovative engineering solutions that meet the highest standards of quality and sustainability.

May 1, 2026

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Coastal Modeller at AECOM | Cardiff

AECOM

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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Principal Town Planner

AECOM

Full-time|On-site|Cardiff

Join our dynamic team at AECOM as a Principal Town Planner in Cardiff. In this pivotal role, you will lead planning projects, providing expert guidance on land use and urban development. Collaborate with various stakeholders, including government agencies and community groups, to ensure sustainable and innovative planning solutions. Your expertise will be crucial in shaping the future of urban environments, making a positive impact on communities.

Jan 8, 2026

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Associate Flood Forecasting Modeller

AECOM

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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Android Engineer at Engine by Starling | Cardiff

Engine by Starling

Full-time|Hybrid|Cardiff, Wales, United Kingdom

Join us at Engine by Starling, where we are excited to partner with forward-thinking banks globally, empowering them to establish high-growth businesses using our cutting-edge technology.Engine operates as Starling's innovative software-as-a-service (SaaS) division, developed to fuel Starling's growth. Recently, we have transitioned into an independent entity, continuing to deliver exceptional software solutions.Starling has achieved remarkable success, largely due to our proprietary technology developed from the ground up. This robust SaaS platform is now accessible to banks and financial institutions worldwide, allowing them to leverage the pioneering digital features and streamlined back-office operations that have contributed to Starling's achievements.Our engineering team is the heartbeat of Engine, thriving in a dynamic environment focused on creation, innovation, and disruptive technology that keeps us at the forefront of the fintech landscape. We foster a flat organizational structure that empowers you to make impactful decisions, regardless of your role. Collaboration and support are woven into our culture, ensuring you're never alone on this journey!To excel at Engine, we seek proactive individuals who take ownership of their responsibilities—from development and design to knowledge sharing and optimizing processes for superior customer outcomes. Our core values—Listen, Keep It Simple, Do The Right Thing, Own It, and Aim For Greatness—guide our mission.Hybrid WorkingWe embrace a hybrid working approach at Engine, preferring candidates who can commute to our Cardiff office for collaborative in-person interactions.About Engineering at Engine by Starling - Explore our engineering careers

Nov 10, 2025

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Platform Engineer at Engine by Starling | Cardiff

Engine by Starling

Full-time|Hybrid|Cardiff, Wales, United Kingdom

Join us at Engine by Starling, where we are committed to collaborating with top banks globally, helping them leverage our innovative technology for rapid growth.Engine, Starling's software-as-a-service (SaaS) division, was established to deliver the cutting-edge technology powering Starling, and has since evolved into a standalone entity. Our exceptional growth trajectory is a testament to the robust, modern technology we've engineered from the ground up.As a leader in the industry, we offer our SaaS platform to banks and financial institutions worldwide, empowering them with innovative digital features and streamlined back-office processes that have fueled our own success.At Engine, everyone is encouraged to contribute to delivering exceptional outcomes for our clients. As an engineering-focused organization, we are seeking passionate individuals who are excited about the transformative potential of our technology in banking across diverse markets. Our core values guide us: Listen, Keep It Simple, Do The Right Thing, Own It, and Aim For Greatness.Hybrid Working ModelWe embrace a hybrid working approach, favoring candidates who are within a commutable distance to one of our offices, fostering in-person collaboration.About Our Engineering TeamThe Cross Cutting Engineering team is the driving force behind our innovation. We focus on creating and maintaining reliable, scalable, and maintainable infrastructure and tools for our software delivery pipeline, from initial code to seamless production deployment and ongoing operations. We tackle complex challenges with a first-principles mindset in a multidisciplinary environment that encourages exploration and contribution across the platform.As a Platform Engineer, you’ll play a pivotal role in building and scaling our state-of-the-art cloud-native banking platform across various global cloud providers and regions. We are seeking engineers with a strong SRE mindset who take ownership of the complete software delivery pipeline and are passionate about developing internal tools that empower our technology teams to operate their applications flawlessly in production.If you don't meet every criterion listed, don't worry! We value curiosity, a willingness to learn, and a desire to engage across multiple disciplines. If you are eager to face the challenges of building and operating a global, cloud-native platform, we would love to hear from you!

May 16, 2025

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Highways and Traffic Engineer

AECOM

Full-time|On-site|Cardiff

Join AECOM as a Highways and Traffic Engineer in Cardiff, where you'll play a vital role in designing and managing innovative transportation solutions. Your expertise will contribute to the development of sustainable infrastructure projects that enhance mobility and safety for communities.

Apr 13, 2026

Principal Hydrologist at AECOM | Cardiff

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