Senior Mechanical (HVAC) Engineer - Data Centers

About the role

A globally recognised engineering and technology business delivering modular mission-critical infrastructure across Europe is hiring a Senior Mechanical (HVAC) Engineer for its Paris-based engineering team. The role leads the HVAC discipline for large-scale data center developments, from concept design and technical development through construction support, commissioning and handover. It works closely with the Chief Technology Officer and international engineering teams, ensuring designs comply with French regulations while keeping global standards.

Key responsibilities

• Lead the HVAC discipline from concept design through commissioning and handover.
• Develop, review and optimise HVAC designs for modular data center facilities, ensuring performance, efficiency and constructability.
• Produce and modify technical documentation: calculations, drawings, specifications and equipment schedules.
• Adapt global engineering standards to French regulations, codes and permitting requirements.
• Coordinate with local consultants, bureaux de contrôle, contractors, suppliers and utility providers.
• Work with Electrical, Structural, Architectural, Fire Protection, Controls and BIM teams on integrated design solutions.
• Review cooling loads, CFD studies, airflow strategies, equipment selection and system performance.
• Support procurement, manufacturing, construction, commissioning and Integrated Systems Testing (IST).
• Resolve design clashes, identify technical risks and guide local and international engineering teams.

Required profile

• Degree in Mechanical, HVAC, Building Services or a related engineering discipline.
• At least 8 years of experience in mechanical/HVAC design or project delivery.
• Previous work on data centers, mission-critical facilities, industrial projects or similar complex infrastructure.
• Knowledge of French regulations, codes, permitting and local engineering practice.
• Fluent French and professional English; permanent (CDI) or 18-month fixed-term contract (CDD).

Required skills

• HVAC design principles and cooling technologies
• Chilled water, air-cooled, CRAH/CRAC, CDU and hydronic systems
• Airflow management, CFD and heat rejection systems
• HVAC controls and BMS integration, commissioning and IST
• BIM coordination and Revit or AutoCAD (advantageous)

What we offer

• Competitive salary and comprehensive benefits package
• Autonomy and technical ownership within the mechanical engineering function
• Exposure to international teams and innovative cooling technologies