Senior Staff Mechanical Design Engineer - Power Electronics

Amperesand; San Francisco (CA); On-site; USD 170,000 - 250,000; Full time

Benefits offered by this job

Medical, vision and dental benefits

401(k) plan

PTO and holidays

On-site collaboration in SF/Reno

Job summary

Amperesand is building foundational energy infrastructure technology with hubs in San Francisco, Reno, and Singapore. We seek a Senior Staff Mechanical Design Engineer to own architecture across power converter platforms, guiding design reviews and cross-functional teams to deliver reliable, scalable solutions.

Expect on-site work in the US with global collaboration. You will lead complex electro-mechanical design, mentor engineers, and drive manufacturing-ready documentation and DFMA strategies

Qualifications

• Bachelor's or Master's degree in Mechanical Engineering or related field.
• 10+ years of mechanical design experience for power electronics, automotive, industrial, or energy products.
• Proficiency in GD&T and DFM/DFA principles.

Responsibilities

• Own the multi-generation mechanical technology roadmap across product platforms.
• Mentor Staff and Senior mechanical engineers and lead design-review governance.
• Represent mechanical engineering in executive and leadership technical reviews.
• Drive build-vs-buy and make-vs-buy strategy at the program level.
• Model and design complex electro-mechanical parts, including plastics, sheet metal, insulators, magnetic components, and high-voltage connectors, creating detailed 3D and 2D designs using CAD software.
• Serve as the primary design point of contact for cross-functional teams, guiding their work and connecting the dots between many inputs to develop a clear plan of attack on problems.
• Collaborate cross-functionally with electrical, thermal, firmware and controls, manufacturing, test, quality, reliability, and industrial design teams.
• Lead prototype development, fabrication, assembly, and mechanical testing of new designs.
• 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.
• Define and execute validation test plans including structural, thermal, and environmental testing.
• Support root-cause analysis of design issues in pilot or production builds and lead iterative improvements.
• 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.
• Create engineering documentation, tolerance stacks, BOMs, and release packages through PLM systems.
• Work closely with suppliers to optimize DFM, DFA, and tooling strategies for high-volume production.
• 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.
• 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.
• Set mechanical design standards and DFM/DFA guidelines used across the engineering organization.
• Willingness to travel up to 15% - 20% including internationally

Skills

Mechanical design leadership

CAD modeling (CATIA/SolidWorks/NX/Creo

GD&T

High-voltage power electronics packing

Thermal/structural analysis

PLM systems experience

Cross-functional leadership

Design for manufacturing (DFM)

Problem solving

Education

Bachelor's or Master's degree in Mechanical Engineering

Tools

3D EXPERIENCE (CATIA)

SolidWorks

NX

Creo

Windchill

Job description

Amperesand is building foundational energy infrastructure technology with hubs in San Francisco, Reno, and Singapore. We seek a Senior Staff Mechanical Design Engineer to own architecture across power converter platforms, guiding design reviews and cross-functional teams to deliver reliable, scalable solutions.

Expect on-site work in the US with global collaboration. You will lead complex electro-mechanical design, mentor engineers, and drive manufacturing-ready documentation and DFMA strategies