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Senior Wastewater Network Modeller - Ireland

Cork, IESeniorPosted Nov 7, 2026

Job description

Location/s: Dublin or Cork; IE Recruiter contact: Nicola Coyle Mott Mac. Donald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices. We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve.

Our people power our performance – we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual. Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you’re surrounded by global specialists who want to combine their expertise and champion you to be your best.

As a proudly employee-owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued. Whatever your ambition, Mott Mac. Donald is where people come to be brilliant. About the business division The Water Utilities Division is Mott Mac.

Donald’s centre of excellence for responding to the UK and Ireland's water and wastewater challenges. The work we do is at the forefront of ensuring safe water supplies for future generations, preventing urban flooding, and improving the health of our rivers and coastal environments. Our multi-disciplinary teams provide a variety of services throughout the full project life cycle, from advisory services and feasibility studies to outline and detailed design.

Together, we deliver best-in-class solutions to our clients while offering diverse and technically stimulating opportunities to our people.

Overview

of the role We have an exciting opportunity for a Senior Wastewater Network Modeller to join our team of innovative and motivated network modellers, engineers and project managers, delivering projects across the UK & Ireland. We are looking for a driven, experienced individual who wants to progress their career, with a desire to evolve within Mott Mac.

Donald, and to mentor and develop others. As a Senior Modeller, you’ll provide key technical inputs on a diverse range of UK wastewater infrastructure projects, from feasibility through to detailed design. Our senior modellers are a key part of our modelling community and have the opportunity to contribute to internal innovation sprints, involved in external conferences, drive the direction of our sub-sector at a strategic level and contribute to business development.

Key responsibilities

Delivering wastewater infrastructure projects of varying sizes Collaborating closely with our clients to ensure they understand model outputs and processes Mentoring and training of graduate modellers and providing guidance to support their professional development Specification and management of flow surveys Undertaking a checking and/or technical lead role of model build, verification and optioneering projects Completing complex modelling tasks where required Contributing and checking technical reports and presentations Developing technical calculation outputs when needed Opportunity to project manage infrastructure projects, if interested.

This will involve being responsible for programme, commercial performance and technical excellence Mott Mac. Donald offers a highly innovative and collaborative environment within which to further develop your career. We can offer development in technical, management or client-facing directions, or a combination thereof - you will have control of your own career path and great prospects for career progression as the business continues to grow.

Candidate specification Essential: Ability to be a team player and develop relationships at all levels Working collaboratively with clients as delivery lead, planning and delivering wastewater modelling projects of varying sizes Strong communication skills Qualified candidates should have a strong working knowledge of Info.

Works ICM as well GIS packages Project Management experience and skills would be advantageous but not required Chartered with a relevant professional institution (i.e. ICE or CIWEM) Excellent skills in spreadsheet data analysis (i.e: using MS Excel pivot tables or PowerBI) Programming skills in languages such as VBA or Python would be advantageous Candidate specification Essential: Ability to be a team player and develop relationships at all levels Working collaboratively with clients as delivery lead, planning and delivering wastewater modelling projects of varying sizes Strong communication skills Qualified candidates should have a strong working knowledge of Info.

Works ICM as well GIS packages Project Management experience and skills would be advantageous but not required Chartered with a relevant professional institution (i.e. ICE or CIWEM) Excellent skills in spreadsheet data analysis (i.e: using MS Excel pivot tables or PowerBI) Programming skills in languages such as VBA or Python would be advantageous Equality, diversity, and inclusion We put equality, diversity, and inclusion at the heart of our business, seeking to promote fair employment procedures and practices to ensure equal opportunities for all.

We encourage individual expression in our workplace and are committed to creating an inclusive environment where everyone feels they can contribute. Accessibility We want you to perform your best at every stage in the recruitment process. If you are disabled or need any support to enable you to apply or attend an interview, please contact us at reasonable.

[email protected] and we will talk to you about how we can support you. Agile working We are happy to talk openly about flexible working and how we can support your responsibilities beyond the workplace. We offer some fantastic benefits including: Flexible working Pension matched up to 7% of base salary Competitive annual leave An annual professional institution subscription Life insurance Income continuance Enhanced Paternity leave Annual company performance bonus scheme – Subject to company performance Cycle to work scheme Travel Tax.

Saver tickets Commitment to Continuing Professional Development – we are accredited by Engineers Ireland Mentoring and support for career development and progression Apply now, or for more information about our application process, click here. <div

Description copied from Mott MacDonald's careers page. Read the full posting before you apply.

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