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Senior Battery Engineer

Cowboy Space Corporation· Avionics
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Kent, Washington$167k - $230kFull-timePosted 3mo ago

About the role

Senior Battery Engineer responsible for design, development, integration, and qualification of spacecraft battery systems, collaborating with cross-functional teams to deliver flight-ready energy storage solutions for space missions.

Responsibilities

  • Own the architecture and development of spacecraft batteries from concept through flight qualification
  • Design battery packs, module architectures, and electrical interconnects to meet mission performance requirements
  • Develop a battery management system (BMS) including cell balancing, SOC/SOH estimation, fault detection, and protection strategies
  • Select battery cell chemistries and components based on mission requirements and environmental constraints
  • Perform battery sizing, capacity analysis, degradation modeling, and lifecycle assessments
  • Develop battery charging and discharge strategies in partnership with the spacecraft power systems team
  • Define thermal management requirements and collaborate with thermal engineers to ensure safe battery operation
  • Lead battery integration, validation, environmental qualification, and acceptance testing
  • Investigate battery performance, reliability, and failure modes through analysis and testing
  • Support manufacturing, supplier selection, DFM/DFT reviews, cell matching, and production readiness
  • Support spacecraft integration, launch campaigns, and on-orbit battery performance monitoring and trending

Qualifications

  • BS, MS, or PhD in Electrical Engineering, Mechanical Engineering, Materials Science, Chemical Engineering, or related discipline
  • 3+ years developing battery systems for aerospace, automotive, defense, or other high-reliability applications
  • Experience designing battery packs and energy storage systems, including cell/module/pack architecture and electrical interconnect design
  • Knowledge of lithium-ion battery chemistry (NMC, NCA, LFP) and safety considerations
  • Experience developing or integrating Battery Management Systems (BMS) including cell balancing, SOC/SOH estimation, and fault protection architectures
  • Experience with battery testing, characterization, and validation including cycle life testing and abuse/safety testing
  • Familiarity with battery modeling, lifecycle analysis, and performance prediction
  • Strong analytical and hands-on hardware debugging skills

Skills

Required:Battery architecture designBMS developmentThermal management collaborationBattery testing and validationMaterials/chemistry knowledge

Benefits

  • Equity in Cowboy Space Corp.
  • Medical, dental, and vision insurance for employees and eligible dependents
  • 401(k) retirement savings plan
  • Paid time off
  • 10 paid holidays per calendar year
  • Paid parental leave
  • Relocation assistance if applicable
  • Daily lunch in the office and a fully stocked kitchen with beverages and snacks
Last updated Oct 4, 2026. Interested? Apply on the company site.

About Cowboy Space Corporation

Powering Humanity From the High Frontier

Cowboy Space Corp. is building a power grid in outer space for artificial intelligence. It is an integrated system of satellites and rockets to haul high-performance compute and optical data transmission down from Low Earth Orbit. Earth's energy grid can't run at the pace of AI. We can.

Orbital Data CentersAI compute in spacesolar-powered data centersLow Earth Orbitpower grid in space
Company profileWebsite

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