Hydraulic Modeller – Water

Nicholas O'Dwyer Ltd; Dublin; On-site; EUR 60,000 - 85,000; Full time

Job summary

Nicholas O’Dwyer Ltd seeks a Hydraulic Modeller – Water to join our Water team in Ireland. The role focuses on water distribution network modelling using Synergi Liquid, with UK and international projects, supporting development, calibration and analysis of hydraulic models to inform planning and operations.

The ideal candidate holds a civil or environmental engineering degree, 3–7 years of modelling experience, and strong analytical and reporting skills, with familiarity in ArcGIS or QGIS.

Qualifications

• Bachelor’s degree in Civil Engineering, Environmental Engineering, or a related discipline.
• 3–7 years’ experience in hydraulic modelling, ideally with a focus on water distribution networks.
• Experience using hydraulic modelling software such as Synergi Liquid, EPANET, or similar.
• Familiarity with GIS platforms such as ArcGIS or QGIS.
• Understanding of water network behavior including demand, headloss, leakage, and operational controls.
• Experience handling asset, flow, pressure, and demand data for model development and validation.
• Strong analytical and problem‑solving skills.
• Good technical report writing and communication skills.
• Ability to work independently and in a multidisciplinary team.
• Experience contributing to model QA/QC and governance.
• Desirable: experience with Uisce Éireann or Irish/UK standards; valid driving licence.

Responsibilities

• Develop, calibrate, and verify hydraulic models of water distribution networks using Synergi Liquid and related tools.
• Support optioneering and feasibility studies, including growth scenarios and operational strategies.
• Assist planning, programming, and coordination of modelling activities on projects.
• Undertake network analysis to support design, optimization, and operational improvements.
• Coordinate field surveys and data collection for model development.
• Prepare technical reports and model outputs per client standards.
• Collaborate with engineers and multidisciplinary teams to integrate outputs into delivery.
• Review asset, GIS, and operational data for modelling purposes.
• Participate in client meetings and technical discussions.
• Support continuous improvement and innovation in modelling practices.
• Stay up-to-date with hydraulics modelling software and best practices.
• Undertake additional responsibilities as needs evolve.

Skills

Hydraulic modelling

Synergi Liquid

EPANET

ArcGIS

QGIS

Data interpretation

Analytical thinking

Education

Civil Engineering

Environmental Engineering

Tools

Synergi Liquid

EPANET

ArcGIS

QGIS

Job description

About The Company

At Nicholas O'Dwyer, sustainability is at the core of our work. If you are looking to advance your career in a socially responsible company, which has a proven track record over 90 years, and is committed to creating a sustainable planet, we invite you to be part of our team.

The Vacancy

Our mission is to provide innovative and reliable solutions using cutting edge technology and expertise, to ensure project success and employee satisfaction. We deliver infrastructure projects in water, wastewater, transportation, civil and structural engineering, flood protection, and energy including renewables. With headquarters in Ireland, we also operate in the UK, Europe, the Middle East, and Africa. As part of the RSK Group, an amalgamation of over 200 companies with more than 17,000 employees, we benefit from a global network of opportunities while retaining our brand and autonomy.

About The Role

We are seeking a Hydraulic Modeller – Water to join our growing Water team in Ireland. The role will focus primarily on water distribution network modelling, with particular emphasis on Uisce Éireann projects using Synergi Liquid. The successful candidate will also support the delivery of hydraulic modelling and network analysis for water supply systems for projects across Ireland, the UK, and internationally. You will support the development, calibration and analysis of hydraulic models to inform planning, design, and operational decision‑making. This is an excellent opportunity for an experienced modeller looking to deepen their expertise in utility‑scale water networks while working within a multidisciplinary consultancy environment.

Key Duties and Responsibilities

• Develop, calibrate, and verify hydraulic models of water distribution networks using Synergi Liquid and related industry tools (e.g. EPANET).
• Support optioneering and feasibility studies, including assessment of growth scenarios, constraints, and operational strategies.
• Assist in the planning, programming, and coordination of modelling activities on assigned projects.
• Undertake network analysis to support assessment, design, optimization, and operational improvements of water systems.
• Participate in the scoping, procurement, and coordination of field surveys and data collection required to inform model development (e.g. flow and pressure monitoring).
• Prepare technical reports, documentation, and model outputs in accordance with client standards (including Uisce Éireann where applicable).
• Work collaboratively with engineers and multidisciplinary teams to integrate modelling outputs into project delivery.
• Support the review and interpretation of asset data, GIS data, and operational data for modelling purposes.
• Participate in client meetings and contribute to technical discussions as required.
• Support continuous improvement and innovation in modelling practices and tools.
• Keep up to date with developments in hydraulic modelling software and best practices.
• Undertake additional responsibilities as required, in line with the evolving needs of the role and the business.

Key Requirements

• Bachelor’s degree in Civil Engineering, Environmental Engineering, or a related discipline.
• Typically, 3–7 years’ experience in hydraulic modelling, ideally with a focus on water distribution networks.
• Experience using hydraulic modelling software such as Synergi Liquid, EPANET, or similar.
• Familiarity with GIS platforms such as ArcGIS or QGIS.
• Understanding of water network behavior including demand and demand allocation, pressure and headloss, leakage and background losses, and operational controls and boundary conditions.
• Experience handling and interpreting asset, flow, pressure, and demand data for model development and validation.
• Strong analytical and problem‑solving skills.
• Good technical report writing and communication skills.
• Ability to work effectively both independently and as part of a multidisciplinary team.
• Experience contributing to model QA/QC and model governance processes.
• Experience working with Uisce Éireann or similar utility clients is desirable as is knowledge of Irish or UK water utility modelling standards and practices.
• Full clean driving licence, with willingness to travel to project sites as required.

About Us

Our mission is to deliver sustainable solutions that transform communities and bring about lasting positive change. Through a blend of expertise, innovation and global dedication, we envision a world where sustainable engineering protects growing communities. Nicholas O’Dwyer provides professional services in engineering design, project management, environment and planning, construction supervision and technical and contract advisory. We are one of the most respected Irish consultancies operating in local and international markets, providing professional services to public‑ and private‑sector clients. Whether in Ireland, the UK or internationally, we understand and solve major challenges associated with delivering and adapting infrastructure for an increasing global population while maintaining a sustainable environment for future generations. Nicholas O’Dwyer is part of the RSK Group, a leading integrated environmental, engineering, and technical services business providing dynamic, multidisciplinary services to a wide range of sectors. RSK was founded in 1989 and has grown considerably since then. At RSK, we operate as a group of businesses that work together seamlessly, aiming for growth through diversification. Our strategy helps us build a strong and resilient business, capable of weathering external challenges, while also providing greater value to our clients and more opportunities for our employees. Since the beginning, our philosophy has remained the same: employ, develop and reward talented individuals. People are crucial to our company, and we recognise that our success hinges on our colleagues' growth. We’re committed to preserving RSK's people‑first culture, promoting innovation, and fostering a supportive and caring environment for collaboration. At RSK, we want you to be part of our successes and help you reach your career aspirations. We take pride in offering employees fulfilling and challenging careers by promoting ongoing growth and empowering individuals to excel. We are committed to fostering an inclusive workplace that welcomes individuals from all backgrounds, experiences, and perspectives. We firmly believe that embracing and celebrating the diversity in our workforce makes us a stronger and more innovative company. If you're passionate about making a difference, join us as we work together to build a brighter, more equitable, and sustainable future for all. Do you have what it takes?