Lead Mechanical Engineer

About the Company

Fluidstack is focused on delivering massive scale compute infrastructure for AI. The company acquires power, designs and builds data centers, and operates them with teams spanning hardware and software to accelerate the deployment of frontier compute.

Responsibilities

• Define and own mechanical cooling strategy across the portfolio, from chip-level thermal interfaces to heat rejection
• Own the mechanical basis of design, master specs, standard drawings, and sequences of operation
• Drive architectural decisions regarding coolant chemistry, chiller topology, and free cooling
• Define modular, prefabricated mechanical assemblies for rapid deployment
• Manage mechanical design delivery across multiple programs and coordinate external MEP consultants
• Build and manage the mechanical engineering team and hold vendors accountable for performance

Requirements

• Experience owning mechanical cooling design for hyperscale or high-performance data centers
• Deep command of chilled water systems, air/water-cooled chillers, and direct liquid cooling
• Experience with high rack densities (75 to 150+ kW/rack)
• Proven track record of building and leading mechanical engineering teams
• Experience developing design standards across a multi-site portfolio
• Experience working on the owner/developer side with accountability for system performance

Preferred Qualifications

• PE license or Chartered Engineer status
• Proficiency in CFD tools (6SigmaET, Ansys Icepak, Flotherm)
• Proficiency in Revit/BIM
• Experience with medium-voltage and 800VDC chiller applications
• Knowledge of ASHRAE TC 9.9