Wastewater Modellers- Belfast

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 impact

Join Jacobs Ireland at a pivotal time for the Irish water sector. With significant national investment in wastewater infrastructure, climate resilience and sustainable growth, this is a unique opportunity to help shape vital projects that protect communities, support development and safeguard Ireland’s natural environment.

As a Wastewater Modeller, you’ll play a key role in the delivery of major wastewater and drainage programmes across Ireland. Working alongside multidisciplinary teams and in partnership with leading public and private sector clients, your expertise will help deliver innovative, data‑driven solutions—from early feasibility and planning through to detailed design, construction support and long‑term asset performance.

At Jacobs, collaboration is central to how we work. You’ll contribute to projects spanning urban drainage, wastewater networks, flood risk management and CSO compliance, helping to address challenges linked to population growth, climate change and regulatory requirements across Ireland.

We’re seeking motivated professionals ready to take the next step in their career—those who want to be challenged, supported and empowered to make a meaningful impact. Whether you’re developing hydraulic models, assessing flood risk, or supporting climate‑resilient infrastructure, your work will directly contribute to better outcomes for Irish communities.

Key Responsibilities

• Support the technical delivery of projects and work closely with Project Managers to ensure robust, high‑quality solutions.
• Develop, build, verify and maintain wastewater and drainage hydraulic models (InfoWorks ICM).
• Work as part of multidisciplinary teams across a range of projects, including model build, validation and performance assessment.
• Undertake optioneering and solutions development for sewer flooding, CSO compliance and capacity constraints.
• Investigate, analyse and resolve wastewater and drainage network issues.
• Scope and manage network surveys to support model updates and improvements.
• Review and manage contractor survey submissions on a weekly basis.
• Deliver technical reports, hydraulic modelling studies and engineering assessments.
• Develop modelled engineering solutions to mitigate the impacts of development, resolve sewer flooding and address unsatisfactory discharges.
• Assist with the preparation of cost estimates and modelling budgets.
• Supervise site surveys and field investigations as required.
• Plan, programme, coordinate and author project deliverables.
• Provide guidance and mentoring to graduate engineers and technicians.

Join Jacobs and be part of a team shaping the future of Ireland’s water infrastructure—delivering smarter, more sustainable solutions for generations to come.

What you’ll need

• Proficiency in wastewater and drainage modelling software such as InfoWorks ICM and InfoAsset Manager, applied within Irish wastewater networks and urban drainage systems.
• Working knowledge of GIS tools including ArcGIS and MapInfo for spatial analysis and integration with hydraulic models.
• Strong understanding of Irish client specifications, national standards and guidance, including those relevant to Uisce Éireann, local authorities and flood risk management.
• Demonstrable track record of technical delivery and client satisfaction within the Irish water and wastewater sector.
• Proven ability to build and maintain effective working relationships with multidisciplinary internal teams and external stakeholders across Ireland.
• Flexible and organised approach, with the ability to multi‑task, prioritise workloads and meet project deadlines in a dynamic consultancy environment.

Joining 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.

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.

Jacobs partners with VERCIDA to help us attract and retain talent from a wide range of backgrounds. 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, please contact the team via Careers Support.