Principal Electrical Power System Engineer

Axiom Space•Houston, CA

About The Position

Axiom Space is seeking a Principal Electrical Power System Engineer to develop and verify electrical power system architecture for the AxEMU PAC, which includes flight computers, radios, sensors, and network switches supporting communication and control during spacewalks. The engineer owns assigned architecture segments end to end, from requirements and supporting analyses through interfaces and verification testing. The role requires deep power-electronics expertise and the ability to produce requirements, models, interface documents, analyses, and review materials that withstand customer, partner, and supplier scrutiny. The engineer will develop and maintain power-system requirements and specifications; model and analyze system behavior; evaluate power-conversion designs; contribute to grounding, bonding, isolation, and fault-detection architecture; plan and support verification campaigns; and present technical material at program reviews, including reviews with NASA. The position also includes mentoring junior engineers and communicating progress, risks, and options to stakeholders and leadership. Work is generally in an office environment but may involve inside or outside work depending on the task. Evening and weekend work may be required to meet critical project milestones. Employment is conditional on meeting applicable export-control screening requirements for access to controlled technical data or technology.

Requirements

Bachelor's degree from an accredited college or university in Electrical Engineering or equivalent.
At Level 5, 12 or more years of experience, including at least one program carried from requirements definition through Critical Design Review or later; an equivalent combination of education and experience may be considered.
Demonstrated depth in power electronics, including DC-to-DC conversion, control-loop behavior and stability, protection devices and coordination, and practical failure modes.
Demonstrated system-modeling capability using Simulink, PLECS, PSIM, Saber, SPICE-class tools, Python, or equivalent, with judgment about which questions a model can address.
Ability to author engineering documentation that withstands external review, including requirement specifications, interface control documents, power-quality specifications, analysis reports, and verification plans and procedures.
Experience managing requirements in a system such as Jama, DOORS, or equivalent.
Direct experience mentoring newer engineers in development activities, including specification development, proposal evaluation, and design reviews.
Hands-on familiarity with electrical test equipment and laboratory practice, including oscilloscopes, electronic loads, programmable supplies, and power analyzers.
Track record of delivering outcomes in ambiguous, fast-moving environments and delivering high-quality results under tight deadlines.
Good judgment and proactive problem-solving that positively impacts difficult challenges.
Organization skills to meet tight deadlines while producing high-quality results.
Ability to work evenings and weekends as needed to meet critical project milestones.
Must meet applicable export-control screening requirements for access to controlled technical data or technology.
Work may involve sitting or standing for extended periods (90% of the time); may require lifting and carrying up to 25 lbs. (5% of the time).

Nice To Haves

Advanced degree.
Human spaceflight or crewed-vehicle experience.
Experience with high-voltage DC distribution, solid-state power controllers, and arc and fault protection in a spacecraft context.
Experience with grounding, bonding, isolation architecture, and EMC control programs, including MIL-STD-461 test campaigns.
Experience with energy-storage systems and integration into a regulated bus.
Experience with orbital replaceable unit design, sparing strategy, and on-orbit maintenance concepts.
INCOSE certification or equivalent demonstrated systems-engineering practice.
Passion for space and the mission; an entrepreneurial growth mindset; high emotional intelligence and ability to collaborate within teams and cross-functionally; and ability to use systems and tools to move smarter and faster.

Responsibilities

Own assigned segments of the Electrical Power System requirement baseline; author verifiable requirements, maintain traceability and verification methods, and close TBD, TBC, and TBR items with identified owners and closing events.
Model the system and prepare power and energy budgets, load-flow and voltage-drop analyses, transient and step-load response analyses, bus-stability analyses, fault-current and protection-coordination analyses, inrush and capacitive-load assessments, harness sizing, and efficiency and dissipation rollups.
Evaluate power-conversion approaches and system-level consequences, including control behavior, current sharing, efficiency, mass, thermal effects, and electromagnetic signature; review and challenge designs at that level.
Author and maintain power-quality specifications for both sides of interfaces, including steady-state voltage limits, ripple and noise, transient envelopes, stability criteria, and limits imposed on power-consuming equipment.
Contribute to grounding, bonding, isolation, and ground-fault-detection architecture; coordinate with the EMC control program on control-plan compliance, test tailoring, and non-compliance disposition.
Plan and support verification, including verification matrices, test requirements and procedures, laboratory and engineering-model test campaigns, power-quality and stability measurement, fault insertion, and data reduction against acceptance criteria.
Prepare, present, and defend material at SRR, PDR, CDR, Test Readiness Review, and Manufacturing Readiness Review, including to NASA, and drive actions to closure.
Mentor junior engineers, review their analyses and documents, and raise the technical standard of the team.
Communicate progress, status, risk, and options to stakeholders and leadership.
Perform additional job duties as assigned.