Wastewater Modelling -Principal​/Associate Director, Ireland

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

Are you a passionate Wastewater Modeller ready to take your career to the next level? At Jacobs, you’ll play a vital role in shaping the future of water infrastructure across Ireland. With unprecedented investment in the sector, now is the time to be part of something transformative.

We’re hiring Principal Modellers and Associate Directors of Modelling to strengthen our teams and support long-term frameworks with leading Ireland water companies. Your expertise will help deliver innovative solutions that protect the environment, reduce flood risk, improve water supply, and create lasting value for local communities.

From early-stage planning to detailed design and delivery, you’ll contribute to diverse programmes across the full project lifecycle. You’ll be supported by a collaborative, multidisciplinary team and have access to cutting-edge tools, professional development, and career progression opportunities.

This is more than a modelling role, it’s a chance to make a meaningful impact while growing in a dynamic and inclusive environment.

• Technical lead for network modelling projects
• Line Management of project team members with responsibility for day-to-day leadership and direction for the team, workload planning, technical guidance, driving staff performance and career development.
• Management of all health and safety, quality and environmental aspects of projects.
• Technical development and delivery of wastewater catchment strategies and solutions, to include flooding and CSO drivers
• Provide technical and commercial leadership in the delivery of wastewater network projects within agreed time frames and budgets and to exceed our clients’ expectations
• Technical governance of outputs and compliance with client specifications
• Using network models for planning, operational and design purposes
• Support and supervise the wastewater modelling team, ensuring technical excellence and best industry practice
• Contribute to developing working methods, routines and innovative solutions to improve processes in the delivery of wastewater network projects
• Supervision of report writing check and review of technical modelling outputs.
• Plan, programme and co-ordinate projects delivery
• Contribute to the preparation of cost estimates

• Supporting management in developing relationships and sales with existing and new clients
• Excellent knowledge of the water industry with a focus on wastewater network solutions
• Proficiency in wastewater modelling software such as Info Asset Manager, and Info Works ICM, ArcGIS, Map Info
• Strong technical ability in the outline design of wastewater schemes; sewage pumping systems and treatment facilities
• Expertise in 1D and 2D modelling
• Excellent knowledge in current industry best practice and able to actively contribute to innovation in this field
• Good supervision and leadership skills
• Ensuring project financial and programme performance.
• Experience of liaising with clients and managing projects
• Management and technical supervision of a team of modellers

• 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.

Applying today and being part of the change is encouraged. Jacobs values safety, integrity, inclusion and belonging. We support one another through our culture of caring, and we aim to embed inclusion and belonging in everything we do.

We are a disability confident employer and welcome applications from candidates who may require flexible working or who may not meet all listed requirements. We partner with VERCIDA to help attract talent from diverse backgrounds. For greater online accessibility please visit  to view roles.

We offer hybrid working arrangements to support flexible working and provide well-being benefits, volunteering opportunities, and tools to help our clients make the world a better place. If you require reasonable adjustments with the recruitment process, please contact Careers Support.