Full-Time

Principal Power Electronics Engineer 1

CesiumAstro

CesiumAstro

201-500 employees

Designs satellite communications hardware and software

No salary listed

No H1B Sponsorship

Austin, TX, USA

In Person

US Citizenship Required

Category
Electrical Engineering (2)
,
Required Skills
Altium
OrCAD
MATLAB
Simulink
Oscilloscope
LTSpice

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Requirements
  • Bachelor of Science (BS) degree or higher in Electrical Engineering (or related) from an accredited university.
  • Minimum of 9 years of experience designing analog and power electronics
  • Experience working with electrical power systems and subsystems, including developing power architecture and power requirements, performing trade studies for size, weight, power, and cost optimization (SWAP-C), selecting power converter topologies, and defining power management and control blocks
  • Experience with modeling and control of DC-DC converters and power stage design of different isolated and non-isolated DC-DC power converters (e.g. discrete linear regulators, Buck, Boost, Buck-boost, Flyback, Forward, Half-bridge, Full bridge, and Resonant converters)
  • Experience designing custom signal and power magnetics, and power filters 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 performing worst-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 or Xpedition
  • Experience with analysis and simulation tools such as SPICE, LTSPICE, SIMetrix/SIMPLIS, PLECS, Simulink, MATLAB, MathCAD, ANSYS Q3D and SiWave, or HyperLynx
  • Excellent written and verbal communication skills
Responsibilities
  • Define electrical power system architecture, and derive power subsystem requirements
  • Design DC-DC power converters, motor drives, inverters, power management and control circuits from concept to production release
  • Perform detailed design for low to high complexity analog and power electronics circuits ranging from single DC-DC power converters to multi-output power supply modules
  • Perform modeling and analysis of analog and power electronics designs including worst-case circuit analysis (WCA), stress analysis, small signal modeling analysis, failure modes and effects analysis (FMEA), reliability analysis, and power integrity analysis
  • Develop design verification test plans, requirement compliance matrices, system integration and qualification test plans, and production acceptance test plans for power converters and power supply designs
  • Lead board bring-up and design verification testing of power electronics circuits and modules
  • Lead system integration, qualification campaigns, and release of analog and power electronics designs into production
  • Mentor younger engineers and foster knowledge sharing
  • Lead a small team of power electronics engineers to drive project execution
  • Perform research and monitor power electronics industry trends to drive innovation and generate intellectual property in this area
Desired Qualifications
  • Master of Science or PhD in Electrical Engineering with research focus in power electronics
  • Experience designing high-reliability analog and power electronics for automotive, space or defense applications
  • Knowledge of space radiation environments and radiation effects in electronics
  • Experience in power electronics applications utilizing GaN or SiC wide bandgap power semiconductor devices
  • Experience running board-level power integrity simulation using tools such as Ansys SiWave, or HyperLynx
  • Experience with soft switching and resonant power converter topologies (e.g. LLC, CLLC, series resonant, phase shifted full bridge, dual active bridge, etc.)
  • Experience with power stage design for inverters and motor drives
  • Knowledge of modeling and control of inverters and motor drives
  • Experience with advanced control schemes for DC-DC power converters (e.g. voltage mode with feedforward control, constant on-time control, V2 constant on-time control, phase shift modulation, average current mode control)
  • Experience with isolation and grounding, failure mode effects analysis and fault tolerant design, and thermal management of power electronics
  • Programming skills to support hardware test and data processing (Python, MATLAB, etc.)
  • Knowledge of maximum power point tracking (MPPT) for solar power applications, battery sizing and battery management systems, power conversion for electric propulsion systems, power conditioning, power management, and power distribution units for spacecraft technology
  • Experience designing and testing power electronics units to meet industry standards and requirements in the automotive, industrial, space or military markets (e.g., FCC, CISPR, UL safety, ECSS, NASA, MIL standards)

CesiumAstro develops end-to-end space and airborne communications systems, including active phased array antennas, software-defined radios, and complete payloads. Its technology enables electronically steered beams for inter-satellite links, high-rate downlinks, lunar and deep-space communication, and 5G/NTN networks. It ships plug‑and‑play, commercially manufactured hardware and SDR software as a full-stack solution, reducing development time and cost. The company targets both government programs (NASA, DoD) and commercial space ventures, aiming to make space-based connectivity more accessible and adaptable.

Company Size

201-500

Company Stage

Debt Financing

Total Funding

$678.2M

Headquarters

Austin, Texas

Founded

2017

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Simplify Jobs

Simplify's Take

What believers are saying

  • $470 million Series C funds manufacturing, satellites, and engineering expansion.
  • Missile Defense Agency work validates Skylark and defense-market demand.
  • Vidrovr acquisition adds AI-driven RF optimization and on-orbit autonomy.

What critics are saying

  • Heavy dependence on defense programs creates award and recompete concentration risk.
  • Texas manufacturing ramp can burn capital before shipments scale.
  • COTS-heavy hardware faces radiation, quality, and supply-chain failure risk.

What makes CesiumAstro unique

  • In-house design, manufacturing, and testing under AS9100-certified processes.
  • Active phased-array payloads, terminals, and fully integrated spacecraft.
  • Software-defined, plug-and-play systems for space and airborne platforms.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

Disability Insurance

Health Savings Account/Flexible Spending Account

401(k) Retirement Plan

Stock Options

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

0%

2 year growth

-1%
TXF
Mar 9th, 2026
CesiumAstro expands Texas headquarters with $500m investment

CesiumAstro expands Texas headquarters with $500m investment. CesiumAstro announced an expansion of its global headquarters in Bee Cave, Texas, with the acquisition of nearly 270,000 square feet of advanced manufacturing space, expanding capacity for continued growth tomorrow.The expansion represents a $500 million capital investment over the next five... Not yet a subscriber? Join TXF today to continue accessing content without any restrictions Or to request access to TXF Intelligence contact TXF

SpaceNews
Feb 26th, 2026
CesiumAstro acquires Vidrovr to embed AI in space communications systems

CesiumAstro has acquired Vidrovr, a startup specialising in artificial intelligence for multimodal signals analysis. The transaction closed in late 2025, though financial terms were not disclosed. The acquisition aims to accelerate CesiumAstro's efforts to embed AI in space telecommunications and intelligence, surveillance and reconnaissance infrastructure, enabling advanced radio-frequency capabilities. Vidrovr's AI technology will be integrated into CesiumAstro's communications systems. The deal reflects growing interest in applying AI to space-based communications and monitoring infrastructure.

Business Wire
Feb 26th, 2026
CesiumAstro Announces Acquisition of Vidrovr to Enhance Space Communications Systems and Build Planetary Intelligence Layer

CesiumAstro announces acquisition of Vidrovr to enhance space communications systems and build planetary intelligence layer. CesiumAstro announced its acquisition of Vidrovr to advance the integration of AI-driven analytics and real-time signal intelligence across its space communications systems, payloads, and satellite platforms. AUSTIN, Texas-(BUSINESS WIRE)-CesiumAstro Inc., a global provider of space and defense communications systems and satellites, today announced the acquisition of Vidrovr, an artificial intelligence (AI) company specializing in real-time multimodal signal analysis. The acquisition accelerates CesiumAstro's strategy to embed AI directly into space telecommunications and ISR (intelligence, surveillance, and reconnaissance) infrastructure, enabling intelligent radio frequency (RF) optimization, autonomous operations of payloads and satellites, and reconfigurable AI-enabled edge compute across its product lines. From mission-critical hardware to software, firmware, and waveforms, this acquisition positions CesiumAstro to further elevate its best-in-class digital processors and active phased array technologies. By embedding analytics and autonomy directly into our communications payloads and Element family of satellites, CesiumAstro is establishing a real-time planetary intelligence layer. Share "Our systems must operate in an increasingly congested and contested environment," said Trey Pappas, Chief Revenue Officer at CesiumAstro. "By embedding AI directly into our telecommunications payloads, we enable adaptive RF optimization, autonomous tasking, and real-time decision-making at the edge. This reduces latency, improves spectrum efficiency, and allows our customers to operate resilient, self-optimizing space networks at scale." AI-enabled workload orchestration allows satellites to determine which data should be processed on orbit and which should be routed to ground-based cloud and enterprise systems, creating a unified, distributed compute fabric spanning space and Earth. Following the acquisition, Vidrovr co-founder Joe Ellis is leading the integration of machine learning capabilities across CesiumAstro's product portfolio, with a focus on next-generation, AI-native space systems. "By embedding analytics and autonomy directly into our communications payloads and Element family of satellites, CesiumAstro is establishing a real-time planetary intelligence layer," said Ellis. "This layer will not only observe global activity, but interpret it, prioritize it, and route the necessary data intelligently across an expanding network of space-based assets." "What attracted me to CesiumAstro was the opportunity to operationalize AI inside production-scale space systems," continued Ellis. "Together, we're enabling distributed intelligence that connects space and terrestrial infrastructure. Our goal is to bring machine learning inference as close to the data as possible, on orbit, and quickly route the most important data to where it should be processed on Earth." The acquisition reinforces CesiumAstro's commitment to vertically integrated, scalable production of high-performance communications payloads and satellites for national security and commercial customers. By combining advanced RF hardware, software-defined architectures, and embedded AI, CesiumAstro delivers adaptive, mission-ready space systems designed for increasingly complex operational environments. Explore how CesiumAstro is integrating Vidrovr's technology in this Q&A with Joe Ellis: https://www.cesiumastro.com/joe-ellis-q-a About CesiumAstro CesiumAstro is a global leader in advanced connectivity solutions for space and defense, delivering next-generation systems that connect, detect, and defend across commercial, government, and national security missions. Its standardized product platforms span satellites, high-performance communications payloads, terminals, and advanced computing systems, all designed for scalable production and mission-ready deployment. CesiumAstro maintains complete vertical integration with in-house design, manufacturing, and testing capabilities certified to AS9100D and ISO 9001:2015 standards. Headquartered near Austin, Texas, the company operates additional facilities in Colorado, California, the United Kingdom, Germany, and Japan.

Resilience Media
Feb 4th, 2026
CesiumAstro raises $470 million to build out low Earth orbit satellites

CesiumAstro raises $470 million to build out low Earth orbit satellites. CesiumAstro has secured $470 million in Series C capital to scale the manufacturing and deployment of space-based communications systems for government and commercial customers. The raise includes $270 million in equity led by Trousdale Ventures, with participation from Woven Capital, Janus Henderson Investors, Airbus Ventures, the Development Bank of Japan, MESH, and NewSpace Capital. An additional $200 million financing package was provided by the Export-Import Bank of the United States and J.P. Morgan under the "Make More In America" initiative. The company said the capital will support construction of a new 270,000 square foot headquarters near Austin, expanded manufacturing capacity, and faster deployment of its software-defined satellite communications platforms. CesiumAstro also plans to increase production of Element, its fully integrated low Earth orbit satellite, and expand engineering and program teams in the US and abroad. "This is a scale moment," said Shey Sabripour, Founder and CEO. "Our technology is moving from breakthrough to American Industrial backbone. This funding lets us deliver resilient, AI-enabled communications to 'connect, detect and defend' at global scale - faster." Founded in 2017, CesiumAstro develops communications payloads, satellites, and onboard computing systems used in proliferated space architectures. The company supplies hardware and software for defense and civil space programs. "CesiumAstro embodies the kind of enduring innovation we look for - engineering excellence with the discipline to deliver hardware over hype," said Phillip Sarofim of Trousdale Ventures. "We've backed the company across multiple rounds because this team isn't chasing headlines - they're building a forever company. Over the past year alone, CesiumAstro moved from announcing its first fully integrated satellite to securing eight SpaceX rideshare launches, accelerating on-orbit validation. Their momentum and maturity set them apart." Clearly, space-focused startups are particularly interesting in the United States and Europe as Ukraine faces an onslaught of Starlink-powered drones. By controlling more of the ground-to-air communications systems via satellite, modern defence companies can offer security and safety without risking jamming or shutdowns.

Payload
Feb 3rd, 2026
CesiumAstro Raises $270M Series C

CesiumAstro raises $270M series C. Thursday February 12, 2026 Waning Crescent Payload in your inbox. In-depth research, exclusive data, and expert analysis on the business and policy of space. Get ahead of the competition.