Engineer, Test & Validation

🏢 Hyliion · 📍 Cincinnati, Ohio, United States

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Position Summary & Responsibilities

Hyliion is committed to creating innovative solutions that enable clean, flexible and affordable electricity production. The Company’s primary focus is to develop distributed power generators that can operate on various fuel sources to future-proof against an ever-changing energy economy.

Job Purpose

The Engineer, Test & Validation is responsible for converting engineering and customer objectives into measured and validated results on the KARNO development team. The role covers the full test cycle: defining the test, assembling and instrumenting the hardware, executing the run, reducing the data, and presenting conclusions in technical review. Work spans KARNO Power Modules and Cores, linear generator and motor dynamometers, and component and subsystem rigs, and the resulting data directly informs program decisions. Because KARNO departs from conventional reciprocating and turbine architectures, using flameless oxidation to drive sealed helium through a thermodynamic cycle with a single magnet-carrying piston per shaft on pressurized helium bearings generating native 800 VDC, no established test methodology exists for a machine of this type. This position therefore carries significant influence over the test methods, rigs, and acceptance criteria against which KARNO is validated.

AI at Hyliion

At Hyliion, AI is core to how we work. We equip every team member with leading AI tools and count on you to use them — to move faster, solve harder problems, and help us realize the full potential of KARNO technology for the world.

Duties and Responsibilities

Operate KARNO Power Modules and Cores through startup, steady-state, step-load, load-acceptance and load-rejection, endurance, thermal cycling, and fuel-switching sequences, evaluated against defined acceptance criteria including ISO 8528 performance classes and program-specific targets.
Operate and maintain linear generator and motor dynamometers, resistive and reactive load banks, and the associated power measurement chain, characterizing efficiency, force, thermal limits, and controls behavior across the operating envelope.
Commission and operate regenerator, heat exchanger, burner, seal, bearing, and pressure vessel rigs, covering flow, pressure drop, effectiveness, leak rate, durability,

🎯 Candidate Preparation Guide For Hyliion Applicants

Key Role Competencies & Evaluation Highlights

Key Role Focus:

Evaluating sustainable powertrain innovation, electromechanical engineering depth, and commercialization strategies for the heavy-duty commercial vehicle market.

📋 Preparation Priorities (Key Areas to Clarify):

1. Ignoring the total cost of ownership (TCO) calculus that drives commercial fleet purchasing decisions.
2. Showing weak cross-disciplinary collaboration between software teams and heavy mechanical engineers.
3. Presenting overly idealistic green tech theories without a grasp of real-world energy grid and fueling infrastructure limitations.

✨ Recommended Role Alignment Hook:

I engineer practical, electrified powertrain solutions that significantly lower emissions while protecting fleet operators' bottom line.

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