Controls Engineer — Build Civilization-Scale AI Infra

Fluidstack; Los Angeles (CA); On-site; USD 210,000 - 260,000; Full time

Job summary

Fluidstack is hiring for a role in the Thermofluids R&D Team in Los Angeles, CA. You will own the control architecture for large-scale chillers and related test rigs, writing interlocks and driving hardware-in-the-loop validation.

The position focuses on capacity control through motor and turbine speed, integration with site BMS, and scaling control solutions for civilization-scale AI infrastructure projects. You’ll work in a fast, high-intensity environment with exceptional engineers.

Qualifications

• You’ve written control logic for rotating machinery and you were in the room the first time it ran.
• You’ve designed interlocks where a fault means destroyed hardware or an injured person.
• You’ve run hardware-in-the-loop testing that caught something real before it reached commissioning.
• You’ve tuned loops on a live machine and worked out why the model and the plant disagreed.

Responsibilities

• Own the control architecture for the machine and the test rigs, spanning the compressor, the motor drive, the expansion turbine and the loop around them.
• Write the safety interlocks and fault handling for a machine whose working fluid can cross its critical point inside the normal operating range.
• Deliver capacity control through motor and turbine speed rather than throttling valves, keeping the process fluid path free of valves at the design point.
• Validate the control system against hardware-in-the-loop before it ever touches the real machine, and prove the interlocks fire.
• Carry the controls out of the test cell and into the production chiller, including integration with site BMS and the wider plant.

Skills

Rotating machinery control

Hardware-in-the-loop testing

High-speed motor control

Interlocks design

Tools

Beckhoff

Siemens

Allen-Bradley

CODESYS

Simulink

Job description

Fluidstack is hiring for a role in the Thermofluids R&D Team in Los Angeles, CA. You will own the control architecture for large-scale chillers and related test rigs, writing interlocks and driving hardware-in-the-loop validation.

The position focuses on capacity control through motor and turbine speed, integration with site BMS, and scaling control solutions for civilization-scale AI infrastructure projects. You’ll work in a fast, high-intensity environment with exceptional engineers.