WE ARE HIRING – Mechanical Engineer III (Contract)We are recruiting for aMechanical Engineer IIIon behalf of our client. This is acontract positionbased inIreland, and we are specifically seeking candidates whoalready have work authorisation in Ireland.Key ResponsibilitiesSupport CFD analysis of airflow and cooling performance in data centres using tools such as HELYX, OpenFOAM, or similar .Post-process simulation results and prepare clear, visual summaries for senior engineers and stakeholders.Assist with validation of CFD models against real-world operational data and benchmarks.Collaborate with design and sustainability teams to assess cooling performance and water usage impacts .Support the development and refinement of in-house modelling tools for airflow and water use simulations.Document model assumptions, inputs, and interpretation of results.Participate in knowledge-sharing and training to learn company-specific CFD workflows and standards.Occasionally assist with thermal or water modelling for experimental designs or new technologies.Basic QualificationsBachelor's degree (or currently pursuing one) in Mechanical Engineering, Aerospace, or a related field.Strong understanding of fluid dynamics and heat transfer fundamentals.Practical experience with CFD tools such as HELYX, OpenFOAM, ANSYS, or SimScale .Basic Python scripting and proficiency with Excel for data analysis.Excellent written and verbal communication skills.Eagerness to learn and adapt to company-specific design requirements and CFD workflows.Preferred Qualifications1–3 years of experience in HVAC, data centre cooling, electronics cooling, or building services .Familiarity with psychrometrics, airside economisers, or evaporative cooling systems .Exposure to automation or scripting for CFD workflows (Python, bash, macros, etc.).Awareness of sustainability metrics such as PUE or WUE .Passion for sustainable, scalable, high-performance infrastructure design.