{"id":3122194,"url":"https://alion.io/job/amperesand-senior-mechanical-design-engineer-2","title":"Senior Mechanical Design Engineer","company":{"id":174955,"name":"Amperesand","domain":"amperesand.io","url":"https://alion.io/company/amperesand","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":91,"open_postings":21,"ghost_share":0,"stale_share":0.143,"repost_share":0,"time_to_fill_p50_days":80,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Sunnyvale, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":130000,"max":150000,"currency":"USD","period":"year","gross":null,"usd_annual":150000},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Agile","optional":false},{"name":"ANSYS","optional":false},{"name":"CATIA","optional":false},{"name":"FMEA","optional":false},{"name":"Jira","optional":false},{"name":"Scrum","optional":false},{"name":"SolidWorks","optional":false},{"name":"Transformers","optional":false}],"status":"live","first_seen_at":"2025-12-22T16:03:52Z","employer_posted_date":"2026-10-22","last_verified_at":"2026-10-25T13:27:53Z","board_verified":true,"closed_at":null,"days_open":306,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":306},"description":"Company Overview \nAmperesand is reinventing how the world powers its most critical systems.\nWe are facing a once-in-a-generation opportunity for infrastructure disruption. Electricity demand is skyrocketing, driven by AI factories, electric vehicles, and modern industrial growth. Energy supply is shifting to incorporate a more diverse mix of resources - including solar, gas, and batteries - at a massive scale.\nAnd yet the power infrastructure behind our latest mega-projects hasn’t meaningfully changed in nearly 100 years. Supply chains for today’s infrastructure equipment can’t match the pace and sophistication of critical energy projects. Amperesand is building hardware and software that rewrites this broken power infrastructure playbook to support a new era of energy abundance.\nWe’ve built a new class of intelligent, software-defined power infrastructure products leveraging a decade of advanced medium voltage Solid State Transformer research that’s now ready for commercial deployment.\nOur products and solutions go far beyond the capabilities of traditional electrical equipment. We make power systems that are faster to deploy, dramatically smaller and more efficient, and capable of supporting modern, dynamic energy needs for tomorrow’s most demanding energy consumers.\nScalable in-house advanced manufacturing capability is our foundation for meeting timeline and quality expectation to serve infrastructure customers around the world.\nAmperesand is led by breakthrough energy hardware development veterans and funded by top tier investors who share our vision of building a category-defining energy technology company.\nWith hubs in San Francisco, Reno, and Singapore, our global team is laser focused on building foundational technology to solve the most pressing problems in power infrastructure at scale.\nJoin us in building the power foundation of the future!\nRole Summary: \nWe 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.\nResponsibilities:\n Utilize CAD software CAD software (3D EXPERIENCE (3DX), CATIA, NX, SolidWorks, Creo etc.) to create detailed mechanical designs.\nModel and design complex electro-mechanical parts, including plastics, sheet metal, insulators, magnetic components, and high-voltage connectors.\n\nPerform mechanical design analysis, including structural FEA, thermal CFD, vibration, and fatigue assessments.\n\nSolve packaging challenges involving electrical isolation, sealing, thermal dissipation, EMI/EMC shielding, and mechanical shock/vibration.\n\nDefine and execute validation test plans including structural, thermal, and environmental testing.\n\n 2D drawings with GD&T for production and inspection.\n\nCreate engineering documentation, tolerance stacks, BOMs, and release packages through PLM systems.\n\nCollaborate cross-functionally with electrical, thermal, Firmware and controls, manufacturing, test, and industrial design teams.\n\nWork closely with suppliers to optimize DFM, DFA, and tooling strategies for high-volume production.\n\nLead prototype development, fabrication, assembly, and mechanical testing of new designs.\n\nSupport root-cause analysis of design issues in pilot or production builds and lead iterative improvements.\n\nDrive trade studies to inform system-level decisions on design architecture, materials, and manufacturing processes.\n\nGuide selection for structural, thermal, and electrical compatibility in high-voltage environments.\n\nContribute to the layout and design of integrated cooling systems including cold plates, thermal interfaces, and airflow paths.\n\nDevelop assembly procedures and manufacturing instructions to support scalable production.\n\nParticipate in mechanical FMEA and DVP&R activities across product lifecycle stages.\n\nWork with quality and reliability teams to meet performance, lifecycle, and safety targets.\n\nQualifications:\nBachelor’s or Master’s degree in Mechanical Engineering or a related field.\n\n3+ years of experience in mechanical design for power electronics, automotive, industrial, or energy products.\n\nExpertise in CAD modeling using 3D EXPERIENCE (CATIA V6/V5), SolidWorks, NX, or Creo.\n\nDeep understanding of mechanical fundamentals-statics, dynamics, heat transfer, and materials.\n\nProficiency in GD&T, tolerance analysis, and DFM/DFA principles.\n\nExperience designing enclosures for IP-rated or outdoor-rated power equipment.\n\nExperience with high-volume manufacturing processes such as injection molding, die casting, extrusion, and sheet metal forming.\n\nWorking knowledge of materials: metals (aluminum, steel), plastics, ceramics, gaskets, potting compounds.\n\nHands-on experience taking designs from prototype through production deployment.\n\nFamiliarity with PLM systems (3D EXPERIENCE, Windchill, etc.) and engineering change workflows.\n\nComfortable with root-cause analysis, failure mode resolution, and mechanical reliability testing.\n\nStrong communication skills and ability to lead cross-functional design reviews and technical deep-dives.\n\nPrior experience collaborating with suppliers on tooling development, DFM feedback, and tolerance negotiations.\n\nFamiliarity with PCBAs, connectors, and mechanical integration of high-density electronic assemblies.\n\nExperience with design and test documentation for regulatory standards (UL, IEC, NEC preferred).\n\nPassion for product innovation, sustainability, and enabling electrification through engineering excellence.\n\nWillingness and ability to travel up to 15% - 20% including internationally\n\nBonus Qualifications:\nStrong background in structural, thermal, and vibration analysis using tools like Ansys Mechanical, Fluent, and Maxwell.\n\nFamiliarity with electronics packaging and PCB interface considerations.\n\nExperience with medium- to high-voltage systems and insulation coordination (creepage, clearance, potting, sealing).\n\nExperience working in Agile development environments, including task management and sprint planning using Scrum methodologies and tools like Jira. \n\nPlease note: This role requires working on-site 5 days a week. We do not offer hybrid or remote options. \nSF Pay Range\n$130,000—$150,000 USD\nPlease note: This role requires working on-site 5 days a week. We do not offer hybrid or remote options. \nWhile this role is listed for the location above, we may consider candidates in other locations on a case-by-case basis.\nOnsite Collaboration Rationale:\nGiven the highly collaborative and cross-functional nature of hardware, embedded systems, and product development, in-person partnership across engineering and product teams is critical to enabling rapid execution, technical alignment, and successful development outcomes.\nWhy Join Amperesand\nWork on next-generation power infrastructure systems\nHigh ownership and visibility\nCross-functional collaboration\nOpportunity to shape future products and infrastructure\nFast-moving startup environment\nPay Disclosure & Benefits\nCompensation will be determined based on experience, location, and other factors permitted by law. \nThe benefits outlined below apply exclusively to employees located in the United States:\nCompetitive Salary + Incentive Stock Options \nMedical, vision, and dental benefits for employees and their dependents, effective from the start of hire \nCompany paid Basic Life, AD&D, short-term and long-term disability insurance \n401k retirement savings plan through Empower \nEmployees receive paid time off (PTO), paid sick days, and paid company holidays \nCommuter Benefits \n100% paid maternal leave (12 weeks) and paternal leave (6 weeks) \nThe benefits outlined below apply to employees located in Singapore:\nCompetitive Salary + Incentive Stock Options\nGroup medical, hospitalisation and surgical insurance, outpatient or GP coverage, group term life, dental and personal accident insurance\nEmployer and employee Central Provident Fund contributions in accordance with the CPF Act (for Singapore Citizens and Permanent Residents)\nAnnual leave, paid sick leave, hospitalisation leave, and all Singapore public holidays, in line with or exceeding the Employment Act\nCommuter Benefits\nGovernment-paid maternity, paternity, shared parental, and childcare leave in accordance with prevailing Singapore statutory entitlements \nAdditional benefits may be available depending on the role and employment type. Benefits are subject to the terms of applicable company policies and plans.\nCandidate Confidentiality & Information Protection \nAs part of our commitment to protecting confidential and proprietary information, candidates should not discloseor provide Amperesandwith any confidential, proprietary, or trade secret information belonging to a current or former employer or any other third party during the application or interview process. \nPlease do not submitor present employer-owned source code, schematics, designs, technical documentation, internal presentations, customer information, prototypes, or other confidential materials. Candidates should discuss their experience and accomplishments at an appropriate leveland use only information and materials they are authorized toshare. \nEqual Employment Opportunity \nAmperesand is an equal opportunity employer and complies with all applicable federal, state, and local fair employment practices laws. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, ancestry, sex, sexual orientation, gender, gender expression, gender identity, genetic information or characteristics, physical or mental disability, marital/domestic partner status, age, military/veteran status, medical condition, or any other characteristic protected by law. \nAmperesand is also committed to working with and providing reasonable accommodations to individuals with disabilities. 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