Electrical Engineer III – Spacecraft Programs (EPS)

Quantum Space is redefining mobility and maneuverability in space. Our high-mobility spacecraft platforms support national security, civil, and commercial missions with unmatched flexibility and propulsion capability. We build fast and iterate quickly.Who We're Looking ForWe are seeking an experienced and technically driven Electrical Engineer III – Spacecraft Programs (Electric Power Subsystem) to lead Electric Power Subsystem (EPS) development for next-generation Ranger spacecraft. In this role, you will drive spacecraft power architecture, subsystem requirements, power analysis, interface definition, hardware development, and integration activities across complex spacecraft development programs.You will work closely with avionics, propulsion, thermal, RF communications, guidance, navigation and control (GNC), payload, mechanical, and systems engineering teams to develop scalable, highly reliable spacecraft power systems supporting long-duration, high-mobility missions. This position is ideal for an engineer who combines deep spacecraft power systems expertise with strong systems thinking and enjoys leading multidisciplinary engineering efforts from concept through flight.You'll Make an ImpactLead Electric Power Subsystem (EPS) development across Ranger spacecraft programs from architecture definition through integration, qualification, and flight readinessDerive EPS subsystem requirements from spacecraft- and mission-level requirements while maintaining complete requirements traceability throughout developmentAuthor and maintain EPS Interface Control Documents (ICDs) while coordinating electrical and operational interfaces across spacecraft subsystemsPerform spacecraft power generation, energy storage, and power distribution sizing analyses based on mission objectives, operational scenarios, and vehicle constraintsDevelop, maintain, and validate spacecraft power models throughout the full spacecraft development lifecycleDefine and manage spacecraft power distribution architectures supporting avionics, propulsion, payloads, RF communications, and vehicle-level operationsResolve complex subsystem integration challenges involving power allocation, electrical compatibility, redundancy, fault management, and operational constraintsPerform make-versus-buy trade studies supporting EPS hardware architecture, component selection, and procurement strategiesCoordinate EPS hardware vendors, suppliers, hardware deliveries, and subsystem integration schedulesDevelop Electric Power Subsystem integration and test (I&T) plans supporting subsystem verification, vehicle integration, environmental qualification, and flight readinessSupport spacecraft assembly, integration, environmental testing, launch campaign activities, and mission readinessParticipate in major engineering reviews including System Requirements Review (SRR), Preliminary Design Review (PDR), Critical Design Review (CDR), Test Readiness Review (TRR), and Flight Readiness Review (FRR)Contribute to continuous improvement initiatives that strengthen spacecraft power system design methodologies, integration processes, and technical standardsWhat It TakesBachelor's degree in Electrical Engineering or a related technical discipline7+ years of experience developing Electric Power Subsystems (EPS) for spacecraft or other complex aerospace platformsExperience deriving spacecraft power subsystem requirements and defining electrical interfaces across multidisciplinary systemsExperience performing spacecraft power generation, energy storage, and power distribution sizing analyses based on mission requirements and operational constraintsExperience developing and maintaining spacecraft power models throughout the product development lifecycleStrong understanding of spacecraft power distribution architectures and subsystem integrationExperience working with high-power and high-current spacecraft electrical systemsExperience managing hardware vendors, suppliers, and procurement activities supporting spacecraft developmentStrong systems-level understanding of spacecraft subsystem interactions and electrical integrationExcellent analytical, technical communication, problem-solving, and cross-functional leadership skillsComfortable operating within a fast-paced spacecraft development environment with high ownership and execution expectationsNice-to-Have ExperienceMaster's degree in Electrical Engineering or a related technical disciplineExperience working across multiple spacecraft subsystems including propulsion, avionics, communications, payloads, and GNCExperience developing high-voltage and mixed-voltage spacecraft Electric Power SubsystemsHands-on experience supporting spacecraft Assembly, Integration, and Test (AI&T), including subsystem- and vehicle-level environmental qualificationExperience supporting spacecraft mission operations following launch and deploymentExperience leading hardware design reviews including schematic and PCB layout reviewsExperience supporting reliability engineering, radiation effects analysis, EMI/EMC compliance, and fault-tolerant spacecraft designExperience using industry-standard ECAD tools including Cadence, Altium Designer, or equivalentKnowledge of emerging spacecraft technologies for power generation, energy storage, and intelligent power distributionExperience supporting long-duration spacecraft missions in GEO, cislunar, or deep-space environmentsWhat You'll GetOwnership – Lead the development of mission-critical spacecraft power architectures supporting advanced Ranger missionsInnovation – Drive next-generation spacecraft power generation, energy storage, and distribution technologies enabling high-mobility space operationsImpact – Deliver reliable, flight-ready power systems supporting national security, civil, and commercial space missionsGrowth – Operate at the center of spacecraft development while influencing vehicle-level architecture, integration, and mission executionCompensation – Competitive salary, equity, and comprehensive benefits including medical, dental, vision, generous leave, FSA, 401(k) matching, and equity sharingLocation: Rockville, MD or Hawthorne, CABase Salary: $125,000–$175,000The salary range for this role is an estimate based on a wide range of compensation factors. Actual salary offer may vary based on (but not limited to) work experience, education and/or training, critical skills, and/or business considerations. Highly competitive equity grants are included in the majority of full-time offers and are considered part of Quantum Space's total compensation package.Additional RequirementsTo comply with U.S. Government space technology export regulations, including ITAR, applicants must be a U.S. citizen, lawful permanent resident, protected individual per 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.Apply now. Join us in building the next generation of spacecraft.