Amperesand · 12 hours ago
Senior Mechanical Design Engineer
San Francisco Bay Area
Full-time
Onsite
Mid, Senior Level
$130K/yr - $200K/yr
3+ years expAmperesand is disrupting industrial power with innovative Solid State Transformer systems. The Senior Mechanical Design Engineer will design custom machinery and support the entire project cycle, collaborating with cross-functional teams to ensure efficient performance and reliability in high-power density environments.
ElectronicsInfrastructurePower GridRenewable Energy
Responsibilities
Utilize CAD software CAD software (3D EXPERIENCE (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
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
Qualification
Required
Bachelor's or Master's degree in Mechanical Engineering or a related field
3+ years of experience in mechanical design for power electronics, automotive, industrial, or energy products
Expertise in CAD modeling using 3D EXPERIENCE (CATIA V6/V5), SolidWorks, NX, or Creo
Deep understanding of mechanical fundamentals—statics, dynamics, heat transfer, and materials
Proficiency in GD&T, tolerance analysis, and DFM/DFA principles
Experience designing enclosures for IP-rated or outdoor-rated power equipment
Experience with high-volume manufacturing processes such as injection molding, die casting, extrusion, and sheet metal forming
Working knowledge of materials: metals (aluminum, steel), plastics, ceramics, gaskets, potting compounds
Hands-on experience taking designs from prototype through production deployment
Familiarity with PLM systems (3D EXPERIENCE, Windchill, etc.) and engineering change workflows
Comfortable with root-cause analysis, failure mode resolution, and mechanical reliability testing
Strong communication skills and ability to lead cross-functional design reviews and technical deep-dives
Prior experience collaborating with suppliers on tooling development, DFM feedback, and tolerance negotiations
Familiarity with PCBAs, connectors, and mechanical integration of high-density electronic assemblies
Experience with design and test documentation for regulatory standards (UL, IEC, NEC preferred)
Passion for product innovation, sustainability, and enabling electrification through engineering excellence
Willingness and ability to travel up to 15% - 20% including internationally
Preferred
Strong background in structural, thermal, and vibration analysis using tools like Ansys Mechanical, Fluent, and Maxwell
Familiarity with electronics packaging and PCB interface considerations
Experience with medium- to high-voltage systems and insulation coordination (creepage, clearance, potting, sealing)
Experience working in Agile development environments, including task management and sprint planning using Scrum methodologies and tools like Jira
Benefits
Competitive Salary + Incentive Stock Options
Medical, vision, and dental benefits for employees and their dependents, effective from the start of hire
Company paid Basic Life, AD&D, short-term and long-term disability insurance
Employees receive paid time off (PTO), paid sick days, and paid company holidays so they can rest, recharge, and take care of their health and personal needs.
Commuter Benefits
12 Weeks Paid Parental Leave
Company
Amperesand
Amperesand operates as a grid infrastructure solution provider.
11-50 employees
H1B Sponsorship
Amperesand has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (5)
Funding
Current Stage
Early StageTotal Funding
$92.45M2025-11-18Series A· $80M
2024-02-07Seed· $12.45M
Leadership Team
Sriram Vaisambhayana
Co-Founder
Recent News
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