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# Test Engineer

- **Company:** CIRCULAR SYSTEMS S.P.C.
- **Location:** San Francisco, CA, United States
- **Contract:** Permanent contract
- **Skills:** 3D Printing, Control Panels, Signal Integrity, Test Data
- **Published:** August 10, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=f5c675638c72a4c2

## About the Role

* Experience operating test rigs or lab hardware, ideally in a thermal, fluids or electronics cooling context
 * Confident with data - able to spot bad readings, sanity-check results and structure output for downstream analysis
 * Comfortable with low-voltage wiring, thermocouples and sensor signals
 * Practical troubleshooter who works the problem on the rig rather than from a desk
 * Able to size and specify components and see procurement through to delivery
 * Hands-on capability with 3D printers, CNC or workshop tooling is a genuine bonus

## Description

Test Rig Operation

 * Lead day-to-day operation of our tray and rack level engineering test and validation rigs
 * Plan, set up and execute test campaigns against engineering requirements
 * Troubleshoot rig faults and drive them to resolution

Data Review and Analysis

 * Carry out preliminary review of test data for quality and validity
 * Feed clean, well-structured data into our analysis pipelines
 * Report findings back to the engineering team and flag anomalies early
 * Propose next steps to drive system efficiency

Rig design, Build and Commissioning

 * Contribute to the final design of tray and rack level test rigs
 * Size, identify and procure key rig components, managing suppliers and lead times
 * Build and commission rigs, including leak checks and function testing

Instrumentation and Electrical

 * Install and wire thermocouples, sensors and signal instrumentation
 * Support mechanical and electrical builds, including control panels, under the guidance of our mechanical and electrical leads
 * Verify sensor calibration and signal integrity before test


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