Mechanical Engineer

Digital Infrastructure; Ireland; On-site; EUR 45,000 - 65,000; Full time

Job summary

A leading engineering firm is seeking a Mechanical Engineer III for a contract position based in Ireland. Ideal candidates will have a Bachelor's degree in Mechanical Engineering and strong CFD tool experience. Responsibilities include supporting CFD analysis for data centers, post-processing simulation results, and collaborating with design teams. Candidates with 1–3 years of HVAC experience and a solid understanding of fluid dynamics will be preferred. Excellent communication skills and a willingness to learn are crucial.

Qualifications

• Bachelor's degree or currently pursuing one in Mechanical Engineering or related field.
• Strong understanding of fluid dynamics and heat transfer fundamentals.
• Practical experience with CFD tools such as HELYX or OpenFOAM.

Responsibilities

• Support CFD analysis of airflow and cooling performance in data centers using CFD tools.
• Post-process simulation results and prepare visual summaries for stakeholders.
• Assist with validation of CFD models against operational data.

Skills

CFD tools (HELYX, OpenFOAM)

Fluid dynamics

Heat transfer fundamentals

Basic Python scripting

Excel for data analysis

Written and verbal communication

Education

Bachelor's degree in Mechanical Engineering or related field

Tools

HELYX

OpenFOAM

ANSYS

SimScale

Job description

We are recruiting for a Mechanical Engineer III on behalf of our client. This is a contract position based in Ireland, and we are specifically seeking candidates who already have work authorisation in Ireland.

Key Responsibilities

• Support 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 Qualifications

• Bachelor’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 Qualifications

• 1–3 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.