Senior Spacecraft Power Systems Architect; Remote

Senior Spacecraft Power Systems Architect (Remote)

Firefly Aerospace is a space and defense technology company that enables our world to launch, land, and operate in space – anywhere, anytime. As the partner of choice for critical space missions, Firefly is the only commercial company to launch a satellite to orbit with 24‑hour notice and the only company to achieve a successful Moon landing. Our launch vehicles, lunar landers, and orbital vehicles provide government and commercial customers with full mission services from low Earth orbit to the Moon and beyond.

Headquartered in north Austin, Texas, Firefly is looking for passionate, hardworking innovators to join our team and help fuel our successful trajectory into space.

The Senior Spacecraft Power Systems Architect is responsible for the architecture, power budget management, analysis, and verification of the spacecraft Electrical Power System (EPS). This role leads power generation, storage, distribution, and regulation while performing radiation analysis, requirements engineering, and environmental qualification to support all mission phases. Previous spacecraft experience is preferred.

• Own EPS architecture, power budget development, allocation, and margin management across all mission phases.
• Perform power system analyses including radiation effects, trade studies, sensitivity, and worst‑case analyses.
• Develop, flow down, and verify power system requirements and cross‑subsystem interfaces.
• Lead verification, qualification, and acceptance test plans including HIL and GEVS‑compliant environmental testing (thermal vacuum, vibration, shock, dynamics).
• Support vehicle AIT, launch integration, and on‑orbit operations.
• Identify tasks, resources, and schedules to meet power system objectives.
• Mentor junior engineers on power architecture and systems engineering practices.

• B.S. in Electrical Engineering, Aerospace Engineering, or related field.
• 7+ years in aerospace systems development, testing, integration, or operations.
• 5+ years in spacecraft power systems engineering and power budget management.
• Experience in systems requirements development, verification, and power analyses (including radiation effects).
• Hands‑on experience with power system testing and troubleshooting.
• Proficiency with Python for modeling, analysis, or automation.
• Proactive self‑starter with strong problem‑solving and communication skills.
• Direct experience with spacecraft EPS (solar arrays, batteries, PCDU) from concept through on‑orbit operations.
• Familiarity with NASA GEVS or SMC‑S‑016 environmental testing standards.
• Experience with FMEA, Fault Tree, or root cause analysis.
• Knowledge of spacecraft grounding, bonding, and EMI/EMC at the system level.
• V‑model methodology or project management experience.

This is a primarily remote position, offering flexibility for day‑to‑day work. Employees are expected to be onsite in Cedar Park, TX during the first week for orientation and onboarding. Additionally, this role requires quarterly onsite attendance in Cedar Park, TX for team collaboration, planning sessions, and key business initiatives. Candidates should be comfortable with periodic travel and in‑person engagement as part of the role.

• Unlimited PTO for exempt employees.
• 3‑month sabbatical for every 5 years of service.
• Medical, dental, vision, life, and disability insurance.
• Mental health services.
• Paid military leave.
• 12 weeks paid maternity leave.
• 4 weeks paid spouse leave.
• $20k toward family planning: fertility, surrogacy, adoption.
• Dog‑friendly workplace.
• $10k/year toward trade school or college.
• Ongoing coaching to advance leadership skills.
• Employee‑ownership with stock bonuses.
• 4% Safe Harbor 401(k) matching.
• $10k bonus for home purchase in Cedar Park, Texas.

Firefly offers outstanding benefits for our employees, including generous health, dental and vision plans with low plan deductibles, parental leave, educational reimbursement, short‑term disability, and flexible PTO options.

To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR), you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.