Full-Time

Mission Operations Engineer

Multiple Teams

Posted on 8/15/2025

Millennium Space Systems

Millennium Space Systems

501-1,000 employees

Delivers national-security space missions and constellations

Compensation Overview

$104.5k - $188.8k/yr

Chantilly, VA, USA

In Person

Applicants must be U.S. citizens and eligible for a security clearance.

US Citizenship, US Top Secret Clearance Required

Category
Aerospace Engineering (2)
,
Requirements
  • B.S. in Aerospace, Electrical, Software, Computer, Mechanical Engineering, or related field
  • Experience with real-time satellite command and control
  • Working knowledge of satellite subsystems, ground systems, space missions, and OPSCON design
  • Experience delivering operational products to customer environments
  • Willingness to support occasional off-nominal working hours during critical 24/7 mission operations activities
Responsibilities
  • Support every aspect of the mission lifecycle, from proposal/mission modeling, design, integration and test, space vehicle shipment, launch and on-orbit operations, to decommissioning
  • Define ground and mission operations requirements, and flow mission requirements back to the space vehicle
  • Define mission concept of operation and design reference missions
  • Design the ground segment, including command and control, mission planning, mission data processing, and the associated infrastructure to support all activities
  • Implement and test space vehicle fault and autonomy, including fault detection and response, autonomous space vehicle behavior, and on-board command and control
  • Develop and implement methods of operational automation, to reduce day-to-day operator responsibilities
  • Create and execute space vehicle simulator tests to validate mission/fault/autonomy design
  • Create and execute in-factory flight vehicle tests to validate mission design compatibility with flight hardware
  • Conduct critical ground segment testing, including radio-frequency compatibility testing, remote ground facility interface testing, and acceptance testing of critical ground assets/locations
  • Design and validate the mission 'sequence of events' for bus commissioning, payload checkout/calibration, and mission operations
  • Plan and lead formal Mission Rehearsal events to train the mission team and to validate the mission design
  • Lead a team of spacecraft and subsystem engineers during launch and early orbit activities to commission the space vehicle(s) for service
  • Perform duties of lead technical authority during mission operations for both the space and ground segments
  • Focal for customer and internal leadership during critical mission activities
  • Provide oversight of nominal on-orbit operations for Millennium’s entire fleet of on-orbit spacecraft
Desired Qualifications
  • Active TS/SCI Clearance
  • M.S. in Aerospace, Electrical, Software, Computer, Mechanical Engineering, or related field
  • Experience in leading multidisciplinary technical teams, especially to resolve anomalous scenarios
  • Experience with external customer briefing/interfacing
  • Deep knowledge of satellite systems engineering, including all satellite subsystems
  • Experience with Spacecraft Command & Control software systems
  • Experience with iterative and agile processes
  • Knowledge of orbital dynamics, maneuver planning, and orbit determination techniques
  • Experience designing fault detection and response, as well as designing space vehicle autonomy
  • Familiarity with software and scripting tools such as MATLAB, Python, C/C++, Java, etc.
  • High level of organization, self-motivation, and an ability to manage many projects in parallel
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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