About this opportunity
Infinity Miles Inc. lists this Senior/Principal Mechanical Engineer opportunity in sullivan, Missouri. Review the employer’s description below for duties, qualifications and application requirements.
Job description
Location: Sullivan, MO / Orange County, CA
Path: Full-Time
Infinity Miles is seeking a Senior Mechanical Engineer to lead the mechanical design, packaging, thermal integration, and product development of our commercial SST platform. This role spans concept development through prototype validation, manufacturing release, and commercial deployment.
Position Overview
The Senior/Principal Mechanical Engineer will be responsible for the design, analysis, integration, and validation of mechanical systems supporting high‑power medium‑voltage equipment. This role spans concept development through prototype validation, manufacturing release, and commercial deployment. You will work closely with power electronics, magnetics, controls, manufacturing, and test engineering teams to develop robust, scalable, and manufacturable products for demanding industrial and utility applications.
Preferred Qualifications
B.S. or M.S. in Mechanical Engineering or related field
5+ years of experience developing power electronics, industrial equipment, energy systems, EV charging equipment, renewable energy products, or similar electromechanical systems
Strong proficiency with SolidWorks, Creo, NX, CATIA, or equivalent CAD software
Experience with sheet metal design, welded structures, machined components, castings, and industrial enclosures
Proficiency with GD&T, tolerance analysis, and DFM/DFA methodologies
Experience with thermal management systems including forced‑air and liquid cooling solutions
Familiarity with FEA and CFD tools such as ANSYS Mechanical, Fluent, SolidWorks Simulation, or equivalent
Knowledge of UL, IEC, IEEE, and industrial equipment standards
Responsibilities
Develop mechanical architectures for medium‑voltage power conversion systems and Solid‑State Transformer platforms
Design electrical enclosures, cabinets, module structures, busbars, mounting systems, and integrated assemblies
Create detailed 3D CAD models and production drawings
Perform structural, thermal, vibration, and fatigue analyses to ensure product reliability
Design and integrate cooling systems including air‑cooled and liquid‑cooled architectures
Lead prototype development, fabrication, assembly, and mechanical validation activities
Develop assembly procedures and manufacturing instructions to support scalable production
Support supplier engagement, component sourcing, tooling development, and DFM/DFA activities
Help commercialize one of the industry's most advanced Solid‑State Transformer platforms while working alongside experienced innovators in power electronics, controls, magnetics, and energy systems.
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Who can apply
Review the original listing for work authorization, qualifications and employer requirements.