Senior Thermo Mechanical Engineer

Amperesand•San Francisco, CA

1d•Onsite

About The Position

Amperesand is seeking a Senior- or Staff-level Thermo-Mechanical Design Engineer to develop an advanced liquid-cooling system for its next-generation medium-voltage solid-state power conversion platform. This hands-on role spans the thermal system’s development from architecture and concept selection through system sizing and modeling, CAD and detailed design, thermal CFD simulation, coolant and airflow routing, design for manufacturing and assembly, validation, and troubleshooting. The engineer will help take the thermal system from architecture into mass production and will have the opportunity to own its design. The role works closely with mechanical, electrical, manufacturing, quality, supplier, and factory teams to design and build a thermal system for a novel application. Thermal performance is critical to the power converter and is a key differentiator for Amperesand. The position is based onsite in San Francisco, Reno, or the South Bay, with travel to the Reno factory during builds required, approximately 20% for 1–2 months per year. The role requires working onsite five days per week; hybrid and remote options are not offered.

Requirements

At least 3 years of experience for Senior level or 6 years for Staff level.
Bachelor’s degree in mechanical engineering or a closely related field.
Experience in liquid-cooling thermal-system and mechanical design.
CAE expertise.
Experience with compressor-loop refrigeration systems.
Demonstrated ability to deliver a thermal system and solve novel engineering problems.
Hands-on testing and validation experience.

Nice To Haves

Master’s or PhD degree.
Experience with Catia 3DX.
Experience with Siemens Amesim or similar tools.
Familiarity with high-voltage design.

Responsibilities

Develop the thermal system for Amperesand’s solid-state power conversion platform from architecture through mass production.
Contribute to thermal-system architecture and concept selection.
Model thermal-system performance across operating conditions and mission profiles.
Design thermal-system components, including 3D and 2D CAD of structures, coolant routing, and interconnections, and perform thermal CFD.
Partner with manufacturing and quality teams on DFM/DFA activities to ensure the thermal-system design is manufacturable.
Prototype and validate the thermal system.
Solve problems across the development process from architecture to start of production.

Benefits

Competitive salary and incentive stock options.
Medical, vision, and dental benefits for employees and dependents, effective from the start of hire (United States).
Company-paid basic life, AD&D, short-term disability, and long-term disability insurance (United States).
401(k) retirement savings plan through Empower (United States).
Paid time off, paid sick days, and paid company holidays (United States).
Commuter benefits.
100% paid maternal leave for 12 weeks and paternal leave for 6 weeks (United States).
Group medical, hospitalisation and surgical insurance, outpatient or GP coverage, group term life, dental, and personal accident insurance (Singapore).
Employer and employee Central Provident Fund contributions in accordance with the CPF Act for Singapore Citizens and Permanent Residents.
Annual leave, paid sick leave, hospitalisation leave, and Singapore public holidays in line with or exceeding the Employment Act.
Government-paid maternity, paternity, shared parental, and childcare leave in accordance with prevailing Singapore statutory entitlements.