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Principal Power Electronics Engineer I

CesiumAstro

El Segundo, CA • $148,500 to $199,000 / yr • 9/22/2026

Engineering , Professional , Skilled & Trades , Manufacturing

Job Description

Job Description
Please Note:To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident, asylee or refugee (protected individuals as defined by 8 U.S.C. 1324b(a)(3)), or eligible to obtain the required authorizations from the U.S. Department of State.
AtCesiumAstro, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands-on, interactive, and autonomous work, CesiumAstro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward-thinking individuals to join our team.
We are seeking aPrincipal Power Electronics EngineerI (2025538) to join ourgrowingspacecraft payload developmentteam.In this position, you willcontribute across the entire development lifecycleofnext-generationpower electronicshardware for satellites and space power systemspayloadsfromleading the definition ofpowersystemarchitectures and trade studies to detailed circuit design, simulation,printed circuit board (PCB)layout, verification and integration testing,production transition,and manufacturing support.
DUTIES AND RESPONSIBILITIES

  • Define electrical power system architecture, and derive power subsystem requirements

  • DesignDC-DCpower converters,motor drives,inverters,powermanagementand control circuitsfromconcept toproductionrelease

  • Perform detailed design forlow to highcomplexity analog and power electronics circuits ranging from single DC-DC power converters to multi-output power supply modules

  • Perform modeling andanalysisof analog and power electronics designs includingworst-case circuit analysis(WCA),stress analysis, small signal modelinganalysis,failure modes and effects analysis (FMEA), reliability analysis,and power integrity analysis

  • Develop design verificationtestplans, requirement compliance matrices, system integration and qualification test plans, and production acceptance test plansforpower converters and power supply designs

  • Leadboardbring-up and design verification testing of power electronics circuits andmodules

  • Lead systemintegration,qualification campaigns, and releaseofanalog and power electronics designsinto production

  • Mentor younger engineersand foster knowledge sharing

  • Lead a small team of power electronics engineers to drive project execution

  • Perform research andmonitorpower electronics industry trends to drive innovation andgenerateintellectual propertyin this area

REQUIREMENTS AND MINIMUM QUALIFICATIONS

  • Bachelor of Science (BS) degree or higher in Electrical Engineering(or related)from an accredited university.

  • Minimum of9years of experiencedesigning analogandpower electronics

  • Experienceworking with electrical power systemsandsubsystems, includingdevelopingpower architecture andpower requirements,performingtrade studiesfor size, weight, power, and costoptimization (SWAP-C),selectingpower convertertopologies,anddefiningpower management and controlblocks

  • Experiencewith modeling and controlofDC-DC convertersand power stagedesign ofdifferentisolated and non-isolatedDC-DC power converters(e.g.discretelinear regulators,Buck,Boost,Buck-boost,Flyback,Forward,Half-bridge,Full bridge,andResonant converters)

  • Experience designing customsignal and powermagnetics,andpowerfilters for low noise and electromagnetic compatibility (EMC)

  • Experience developing design verification test plans, requirement compliance matrices, system integration and qualification test plans, and production acceptance test plans

  • Experience performingworst-case circuit analysis (WCA), stress analysis, failure modes and effects analysis (FMEA),and reliability analysis for power supplies

  • Extensive hands-on experience with testing and troubleshooting electronics and power converters using laboratory instruments such as oscilloscopes, impedance analyzers, spectrum analyzers, electronic loads, and signal generators

  • Experience with electronics schematic capture and printed circuit board (PCB) layout tools such as Altium, OrCAD, Allegro orXpedition

  • Experience with analysis and simulation tools such as SPICE, LTSPICE,SIMetrix/SIMPLIS, PLECS, Simulink, MATLAB,MathCAD, ANSYS Q3D andSiWave, orHyperLynx

  • Excellent written and verbal communication skills

PREFERRED EXPERIENCE

  • Master of Science or PhDin Electrical Engineering with research focusin power electronics

  • Experience designing high-reliability analog and power electronics forautomotive,space or defense applications

  • Knowledge of space radiation environmentsand radiation effects in electronics

  • Experience in power electronics applications utilizingGaNorSiCwide bandgap power semiconductor devices

  • Experience running board-level power integrity simulation using tools such as AnsysSiWave, orHyperLynx

  • Experience withsoft switching and resonant power converter topologies (e.g.LLC, CLLC, series resonant, phase shifted full bridge, dual active bridge, etc.)

  • Experiencewith power stage design forinverters and motor drives

  • Knowledge ofmodeling and control of inverters and motor drives

  • Experience withadvanced control schemes for DC-DC power converters (e.g.voltage mode with feedforward control, constant on-time control, V2constant on-time control, phase shift modulation, average current mode control)

  • Experience with isolation and grounding,failure mode effects analysisand fault tolerant design,and thermal managementof power electronics

  • Programming skills to support hardware test and data processing (Python, MATLAB, etc.)

  • Knowledge ofmaximum power pointtracking (MPPT)for solar power applications,battery sizing and battery management systems,power conversion forelectric propulsion systems, power conditioning,powermanagement, andpowerdistributionunitsfor spacecraft technology

  • Experiencedesigning and testingpower electronics unitsto meetindustry standards and requirementsin theautomotive, industrial, space ormilitarymarkets(e.g.,FCC, CISPR, ULsafety,ECSS, NASA, MIL standards)

CesiumAstro considers several factors when extending an offer, including but not limited to, the role and associated responsibilities, a candidate’s work experience, education/training, and key skills. Full-time employment offers include company stock options and a generous benefits package including health, dental, vision, HSA, FSA, life, disability and retirement plans.
CesiumAstro is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard torace, color, religion, sex, national origin, disability, protected Veteran Status, or any other characteristic protected by applicable federal, state, or local law.
Please note: CesiumAstro does not accept unsolicited resumes from contract agencies or search firms. Any unsolicited resumes submitted to our website or to CesiumAstro team members will be considered property of CesiumAstro, and we will not be obligated to pay any referral fees.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.