Systems Test Engineering, Senior

Reports to: VP of Engineering

Fleetzero is electrifying global maritime shipping with marine-grade lithium‑iron‑phosphate battery systems built for the harshest environments on the planet. Our Leviathan battery platform is in active ABS Product Design Assessment, with hardware on test rigs today and production hardware shipping in the near term. We are hiring a Senior Test Engineer to take full ownership of our battery test program: the rigs, the procedures, the automation, and the evidence packages that turn engineering work into class‑approved, vessel‑ready hardware.

Take full responsibility for our existing cell, module, and pack‑level test stations: cyclers, environmental chambers, abuse test enclosures, HV safety systems. Document them. Write test plans, procedures, and reports for characterization, verification, validation, and abuse testing: including thermal propagation, overcharge, over‑discharge, external short circuit, vibration, IP ingress, and thermal cycling. Run witness testing. Execute ABS and USCG witness tests on‑site, including pre‑test dry runs, surveyor walkthroughs, and post‑test documentation packages.

Help us mature requirements‑to‑test traceability tooling across the engineering organization.

Develop Python (or equivalent) automation for cycler control, DAQ, post‑processing, and report generation. Eliminate manual data wrangling wherever it shows up.

Lead root‑cause investigation when hardware fails on the bench, in qualification, or in the field. Help shape Fleetzero’s test engineering culture as we scale from R&D into production. Degree in Electrical Engineering, Mechatronics, or related field, or equivalent hands‑on experience. 5+ years of test engineering experience in batteries, energy storage, EV powertrains, aerospace, or another safety‑critical hardware domain.

HIL experience using NI, dSPACE, Speedgoat, or equivalent platforms, and a clear point of view on what makes a HIL test rig actually useful versus merely impressive.

Strong scripting and data analysis skills in Python (preferred), MATLAB, or LabVIEW, including comfort building test automation from the ground up.

Working knowledge of CAN, RS‑485, Modbus, and other industrial communication protocols.

Clear technical writing. Your test reports do not require a phone call to interpret.

Experience supporting class society (ABS, DNV, Lloyd’s, BV) or regulatory (USCG, Coast Guard, FAA, NHTSA) witness testing.

Functional safety background (IEC 61508, ISO 26262, or marine equivalents).

Experience building out a test lab from scratch: fixturing, safety systems, fire suppression, ventilation, HV lockout‑tagout.

Marine, naval, or shipboard experience. Bonus points if you have ever stood a watch.

We are a small, dense engineering team in Houston. We work in person because integration problems live in the gaps between disciplines, and the gaps close faster when you can walk over to the next bench. We document because the next person who reads our work might be a class surveyor, a customer's chief engineer, or a future version of ourselves at 2 AM in a shipyard.

Our team includes mariners, fabricators, software engineers, and sales people.