At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good.Your impactIreland's water sector is undergoing a major transformation. Unprecedented investment and technological innovation are creating a once-in-a-generation opportunity to redefine water and wastewater infrastructure.At Jacobs, we're proud to be at the forefront of this transformation—partnering with Uisce Éireann (Irish Water), Northern Ireland Water, and the Department for Infrastructure (DfI) to deliver critical water and wastewater services, flood management solutions, and environmental protection projects. These initiatives make a real difference to communities across Ireland.We've secured multiple long-term frameworks and programmes, giving our teams the chance to work on projects that span the entire lifecycle—from strategic planning and feasibility studies to detailed design, construction, and commissioning.We're looking for Mechanical Engineers at all levels—from ambitious early-career professionals to experienced leaders—to join our teams across Ireland. Whether you're starting out or ready to take on a senior role, you'll work on detailed design and Design & Build projects for water, wastewater, and bioresources infrastructure.You'll design and deliver mechanical systems for pumping stations, treatment plants, and associated assets, ensuring compliance with regulatory and safety standards. Depending on your experience, you'll contribute to or lead engineering activities throughout the project lifecycle—collaborating with multidisciplinary teams and clients to achieve outstanding results.Key responsibilitiesDeliver Mechanical Design Excellence Design water and wastewater systems, including pumping stations, treatment plants, and associated infrastructure, from concept through completion.Innovate & Add Value Participate in value engineering and buildability workshops, delivering sustainable and innovative design solutions.Project Lifecycle Involvement Develop feasibility studies, outline and detailed designs, and provide construction and commissioning support.Technical Documentation Produce design layouts, technical specifications, datasheets, and P&IDs for mechanical systems.Equipment Selection Specify mechanical equipment such as pumps, blowers, screens, valves, chemical dosing plant, and odour control systems.Site Engagement Conduct site surveys and investigations, liaising with clients, contractors, and suppliers.Compliance & Standards Ensure designs meet Irish and UK water industry standards, health & safety, and environmental regulations.Team Development Mentor junior engineers and contribute to building a strong, collaborative team culture.Collaborative Delivery Work closely with civil, electrical, and process engineers to deliver integrated solutions.Project Management Support or lead design management, scheduling, risk management, and financial forecasting.Here's what you'll needWorking toward or holding chartered status (e.g., IMechE or Engineers Ireland).Experience ranging from developing core mechanical engineering skills to 12+ years in detailed design and Design & Build execution for water, wastewater, and bioresources projects.Strong understanding of mechanical engineering principles, project lifecycle management, and mechanical equipment used in water/wastewater treatment.Familiarity with Irish water sector regulations, health & safety, and environmental standards.Excellent communication, collaboration, and organisational skills; leadership experience for senior roles.Robust understanding of health, safety, and welfare legislation.Experience with design tools (e.g., AutoCAD, Revit, BIM) is advantageous.Why Join Jacobs?Grow Your Career – From early talent to seasoned professionals, we offer clear paths for progression and development.Shape the Future of Water – Work on innovative, high-impact projects that protect resources and drive sustainability.Collaborate with the Best – Partner with industry-leading clients and experts in a thriving, future-focused sector.Ready to make a difference?Join Jacobs and help deliver smarter, sustainable water solutions for generations to come.Apply today and be part of the changeJoining Jacobs not only connects you locally but globally. Our values stand on a foundation of safety, integrity, inclusion and belonging. We put people at the heart of our business, and we truly believe that by supporting one another through our culture of caring, we all succeed. We value positive mental health and a sense of belonging for all employees.With safety and flexibility always top of mind, we've gone beyond traditional ways of working so you have the support, means and space to maximize your potential. You'll uncover flexible working arrangements, benefits, and opportunities, from well-being benefits to our global giving and volunteering program, to exploring new and inventive ways to help our clients make the world a better place. No matter what drives you, you'll discover how you can cultivate, nurture, and achieve your goals – all at a single global company. Find out more about life at Jacobs.We aim to embed inclusion and belonging in everything we do. We know that if we are inclusive, we're more connected and creative. We accept people for who they are, and we champion the richness of different perspectives, lived experiences and backgrounds in the workplace, as a source of learning and innovation. We are committed to building vibrant communities within Jacobs, including through our Jacobs Employee Networks, Communities of Practice and our Find Your Community initiatives, allowing every employee to find connection, purpose, and belonging. Find out more about our Jacobs Employee Networks here.Jacobs partners with VERCIDA to help us attract and retain talent from a wide range of backgrounds. For greater online accessibility please visit to view and access our roles.As a disability confident employer, we will interview disabled candidates who best meet the criteria. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.We value collaboration and believe that in-person interactions are crucial for both our culture and client delivery. We empower employees with our hybrid working policy, allowing them to split their work week between Jacobs offices/projects and remote locations enabling them to deliver their best work.Your application experience is important to us, and we're keen to adapt to make every interaction even better. If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team via Careers Support.