Full-Time

Senior Spacecraft Power Systems Engineer

Posted on 7/15/2025

Millennium Space Systems

Millennium Space Systems

501-1,000 employees

Delivers national-security space missions and constellations

Compensation Overview

$104.5k - $186.3k/yr

No H1B Sponsorship

El Segundo, CA, USA

In Person

Category
Electrical Engineering (1)
Required Skills
Circuit Design
Oscilloscope
Requirements
  • Bachelors Degree in electrical, computer, or other relevant engineering discipline
  • 5 or more years experience in the design, development, analysis, implementation, testing, and/or operation of spacecraft power systems
  • Experience modeling and simulating power system loads against input power
  • Experience with and knowledge of solar arrays and Li-ion batteries, how they’re designed, built, and tested
  • Experience with power control and distribution electronics and architectures
  • Experience working with engineers of multiple disciplines in the design and test of complex systems
  • Experience writing and reviewing technical documents such as test procedures, design diagrams, and requirements specifications
  • Experience testing electronics using tools such DMMs, oscilloscopes, PSUs, E-Loads, and custom test racks
  • Knowledge of power circuit design fundamentals
  • Excellent communication and presentation skills
  • Ability to obtain and maintain a TS/SCI Security Clearance
  • U.S. citizenship or eligibility for security clearance (implied by posting)
Responsibilities
  • Perform spacecraft Electrical Power subsystem (EPS) design and analysis at the spacecraft level, including interfaces with other subsystems
  • Develop system, subsystem, and component level requirements derived from higher level requirements sets
  • Develop spacecraft level power models to predict power loading and performance margins to support system design
  • Support battery, solar array, and electronics design
  • Brief design and analysis materials to program managers, customers, and/or sponsors
  • Support system level functional and environmental testing
  • Provide on-orbit support during mission operations and anomaly resolution
  • Assist in proposal and business development efforts
  • Coordinate efforts with consultants when necessary
  • Manage cost and schedule for satellite EPS tasks
  • Mentor junior engineers
Desired Qualifications
  • Experience with high-reliability automotive or aerospace electronics
  • Experience with mitigation of space environmental effects on electronics, solar arrays, and batteries
  • Experience in MATLAB or other comparable software tool
  • Experience with managing project budgets and schedules
  • Experience with mentoring junior engineers
Millennium Space Systems

Millennium Space Systems

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Millennium Space Systems provides space systems for national security, delivering missile-warning and other space missions by rapidly creating affordable prototypes and satellite constellations across different orbits. Its products are designed to work correctly the first time, with an emphasis on speed to meet customer needs. The company differentiates itself by offering fast, cost-effective prototype-and-constellation solutions rather than long, expensive development cycles, focusing on reliable performance for critical space missions. The goal is to enable secure, rapid, and dependable space capabilities for national security customers.

Company Size

501-1,000

Company Stage

N/A

Total Funding

N/A

Headquarters

El Segundo, California

Founded

2001

Simplify Jobs

Simplify's Take

What believers are saying

  • Targeting 26 satellite deliveries in 2026, up from 4 in 2025 via El Segundo investments.
  • Tony Gingiss appointed CEO December 9, 2024, drives Boeing-Millennium integration.
  • Delivered TRACERS satellites to Vandenberg June 16, 2025 for NASA mission.

What critics are saying

  • Production fails 550% ramp to 26 satellites in 2026, slips schedules 6-12 months.
  • Resolute design delays past 2026 bid-ready, loses to Relativity Space.
  • FOO Fighter fails 2027-2028 testing, Space Development Agency terminates $414M contract.

What makes Millennium Space Systems unique

  • Resolute platform fills 2-4 kW gap between Millennium small sats and Boeing large sats.
  • FOO Fighter delivers fire-control sensing for hypersonic missile tracking in LEO.
  • Secured spot on Space Force’s $1.84B RG-XX Andromeda contract for GEO reconnaissance.

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Benefits

Professional Development Budget

401(k) Company Match

Remote Work Options

Paid Vacation

Paid Sick Leave

Paid Holidays

Hybrid Work Options

Mental Health Support

Wellness Program

Company News

PR Newswire
Jun 16th, 2025
Millennium Space Systems Delivers Pair Of Space Vehicles To Launch Site For Nasa'S Tracers Mission

EL SEGUNDO, Calif., June 16, 2025 /PRNewswire/ -- Millennium Space Systems, a Boeing Company, delivered two space vehicles for NASA's Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites (TRACERS) mission to Vandenberg Space Force Base Friday, marking a key milestone in preparation for launch later this year

Envision
Apr 9th, 2025
Boeing's bet: supercharge satellite production

When Envision Employment Services Incorporated acquired Millennium in 2018, it built prototypes and delivered one or two satellites a year.

Stock Titan
Dec 16th, 2024
Millennium Space Systems Names Tony Gingiss as CEO

Millennium Space Systems, a Boeing Company [NYSE: BA], has appointed Tony Gingiss as its new CEO effective December 9, 2024.

Military News
Oct 28th, 2024
U.S. Enhances Early Warning System with New Satellite Batch for Epoch Program

Millennium Space Systems signed the initial contract to deliver the first six satellites for MTC Epoch 1 in 2023.

SpaceNews
Aug 29th, 2024
Firefly names space industry veteran Jason Kim as new CEO

Kim joins Firefly from Millennium Space, a Boeing subsidiary specializing in small satellites primarily for U.S. government agencies, where he served as CEO.

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