Sr. Mechanical Design Engineer

Company Overview :

Amperesand is disrupting industrial power with the first commercialized Solid State Transformer systems. Solid State Transformer systems are much more than a transformer replacement, enabling numerous advanced features to unlock solutions for data centers, EV charging, renewables, microgrids, and industrial installations. We are looking for mission driven team members passionate about making amazing products for worldwide electrification at maximum acceleration. Amperesand is building a global company and looking for talent across our geographies.

We are seeking a skilled Senior Mechanical Design Engineer to join our team and contribute to the development of power electronics products. The primary function of this position is to design custom machinery and support the entire project cycle from concept development through installation, commissioning, and handover to the operations team. You will work closely with cross-functional teams, including product design, Controls, manufacturing, and test engineers, to ensure efficient performance and reliability in high-power density environments.

Responsibilities :

Utilize CAD software CAD software (3DEXPERIENCE (3DX), CATIA, NX, SolidWorks, Creo etc.) to create detailed mechanical designs.

• Lead the mechanical architecture and design of medium-voltage power electronics converter assemblies.
• Model and design complex electro-mechanical parts including plastics, sheet metal, insulators, magnetic components, and high-voltage connectors.
• Perform mechanical design analysis including structural FEA, thermal CFD, vibration, and fatigue assessments.
• Solve packaging challenges involving electrical isolation, sealing, thermal dissipation, EMI / EMC shielding, and mechanical shock / vibration.
• Define and execute validation test plans including structural, thermal, and environmental testing.
• 2D drawings with GD&T for production and inspection.
• Create engineering documentation, tolerance stacks, BOMs, and release packages through PLM systems.
• Collaborate cross-functionally with electrical, thermal, Firmware and controls, manufacturing, test, and industrial design teams.
• Work closely with suppliers to optimize DFM, DFA, and tooling strategies for high-volume production.
• Lead prototype development, fabrication, assembly, and mechanical testing of new designs.
• Support root-cause analysis of design issues in pilot or production builds and lead iterative improvements.
• Drive trade studies to inform system-level decisions on design architecture, materials, and manufacturing processes.
• Guide selection for structural, thermal, and electrical compatibility in high-voltage environments.
• Contribute to the layout and design of integrated cooling systems including cold plates, thermal interfaces, and airflow paths.
• Develop assembly procedures and manufacturing instructions to support scalable production.
• I participate in mechanical FMEA and DVP&R activities across product lifecycle stages.
• Work with quality and reliability teams to meet performance, lifecycle, and safety targets.
• Mentor junior engineers and provide technical leadership across multiple product programs.
• Contribute to strategic technology development for future-generation SST products and enclosures.

Qualifications :

Preferred Qualifications :

Experience working in Agile development environments, including task management and sprint planning using Scrum methodologies and tools like Jira.

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