# Mechanical Engineer, Demand Management

**Company:** [Fluidstack](https://hotfix.jobs/companies/fluidstack)
**Location:** Austin, TX, New York, NY, San Francisco, CA, Seattle, WA
**Role:** Hardware Engineering
**Salary:** $203k – $232k/yr
**Experience:** 7+ years
**Skills:** hvac, thermal modeling, dynamic simulation, cfd, modelica, trnsys, liquid cooling, thermal storage, psychrometrics, data center cooling
**Posted:** 2026-07-17

> 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.

## Job Description

## 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.

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