Senior/Principal Mechanical Engineer

Infinity Miles Inc.; Sullivan (MO); On-site; USD 85,000 - 110,000; Full time

Job summary

Infinity Miles Inc., located in Sullivan, MO, is seeking a Senior Mechanical Engineer. This role involves leading the mechanical design, packaging, thermal integration, and product development of innovative solid-state transformer systems. The successful candidate will collaborate closely with various teams to ensure robust and scalable product designs.

Qualifications include a B.S. or M.S. in Mechanical Engineering and 5+ years of experience in related fields. Proficiency with CAD tools and cooling system design is essential.

Qualifications

• 5+ years of experience in mechanical design and electromechanical systems.
• Strong proficiency in CAD software.
• Experience in thermal management and cooling solutions.

Responsibilities

• Develop mechanical architectures for power conversion systems.
• Design cooling systems and integrated assemblies.
• Lead prototype development and mechanical validation activities.

Skills

SolidWorks

Creo

NX

CATIA

Thermal management systems

DFM/DFA methodologies

Education

B.S. or M.S. in Mechanical Engineering or related field

Tools

ANSYS Mechanical

Fluent

SolidWorks Simulation

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.