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FluidstackFluidstack

Mechanical Engineer, Demand Management

Mechanical Engineer responsible for designing and modeling demand-flexible cooling systems for AI data centers, including thermal inertia modeling, field validation, and turning cooling infrastructure into a grid asset. Requires experience with dynamic thermal modeling and HVAC systems for data centers or industrial plants.

About the job

Responsibilities

  • Engineer the mechanical side of demand flexibility: cooling systems that ride through load flex without thermal risk.
  • Model thermal inertia and headroom: how far and how long the plant can flex, quantified per site.
  • Design the mechanical strategies, setpoint moves, staging, and storage, that turn cooling into a grid asset.
  • Validate in the field: instrumented tests proving the models before the fleet runs on them.

Requirements

  • Engineered mechanical or HVAC systems for data centers or industrial plants.
  • Modeled thermal systems dynamically, not just at steady state.
  • Run field validation campaigns and reconciled model to measurement.
  • Quantify risk in operating terms: degrees, minutes, and margins.
  • Work jointly with controls engineers as one system team.

Nice-to-Haves

  • Liquid cooling.
  • Dynamic simulation (Modelica, TRNSYS) or CFD.
  • Thermal storage.
  • Psychrometrics depth.

Skills

Hvac, Thermal Modeling, Dynamic Simulation, Cfd, Modelica, Trnsys, Liquid Cooling, Thermal Storage, Psychrometrics, Data Center Cooling

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