Spacecraft Battery Engineer - Flight-Qualified Power

Cowboy Space Corp.; San Carlos (CA); On-site; GBP 167,000 - 230,000; Full time

Benefits offered by this job

Equity in Cowboy Space Corp.

Medical, dental, and vision insurance

401(k) retirement savings plan

Paid time off

10 paid holidays per year

Paid parental leave

Relocation assistance if applicable

Lunch in the office

Job summary

Cowboy Space Corp. is seeking a Battery Engineer to own the design, development, integration, and qualification of spacecraft battery systems.

You will lead energy storage solutions powering missions through eclipse periods and peak loads, collaborating with power, avionics, and thermal teams to deliver flight‑ready hardware. This role demands hands‑on hardware work, rigorous qualification, and close coordination with the spacecraft power systems team to ensure safe operation in space

Qualifications

• BS, MS, or PhD in Electrical Engineering, Mechanical Engineering, Materials Science, Chemical Engineering, or a 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), degradation mechanisms, 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, performance characterization across temperature, and abuse/safety testing
• Familiarity with battery modeling (equivalent circuit models or electrochemical models), lifecycle analysis, and performance prediction
• Strong analytical and hands‑on hardware debugging skills

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 SOC/SOH estimation and fault protection
• Select battery cell chemistries based on mission requirements and environmental constraints
• Perform battery sizing, degradation modeling, and lifecycle assessments
• Develop battery charging/discharge strategies with power systems teams
• Define thermal management requirements and mitigate thermal runaway risks
• Lead battery integration, validation, and environmental qualification testing
• Investigate battery performance, reliability, and failure modes through analysis and testing
• Support manufacturing, supplier selection, DFM/DFT reviews, and production readiness
• Support spacecraft integration, launch campaigns, and on‑orbit monitoring

Education

BS/MS/PhD in Electrical Engineering, Mechanical Engineering, Materials Science, Chemical Engineering, or related discipline

Tools

MATLAB/Simulink

Python

Battery Modeling

ECSS/NASA standards

Job description

Cowboy Space Corp. is seeking a Battery Engineer to own the design, development, integration, and qualification of spacecraft battery systems.

You will lead energy storage solutions powering missions through eclipse periods and peak loads, collaborating with power, avionics, and thermal teams to deliver flight‑ready hardware. This role demands hands‑on hardware work, rigorous qualification, and close coordination with the spacecraft power systems team to ensure safe operation in space