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Spacecraft Thermal Engineer; Mid to Senior Career; Millennium Space Systems

Job in El Segundo, Los Angeles County, California, 90245, USA
Listing for: Boeing
Full Time position
Listed on 2026-10-10
Job specializations:
  • Engineering
    Aerospace / Aviation / Avionics, Systems Engineer, Mechanical Engineer, Electrical Engineering
Salary/Wage Range or Industry Benchmark: 102000 - 182500 USD Yearly USD 102000.00 182500.00 YEAR
Job Description & How to Apply Below
Spacecraft Thermal Engineer (Mid to Senior Career)

Spacecraft Thermal Engineer (Mid to Senior Career) - Millennium Space Systems Company:

Millennium Space Systems, a part of Boeing Defense, Space and Security (BDS), is a fast, agile small satellite company focused on national security space. Our missions have direct impact to global security, like missile warning and Earth observation. Our team is curious, bold and innovative. We take risks, innovate and explore new techniques and technologies. We influence change because we challenge the status quo.

And when we watch our satellites launch, we know each one of us made it happen.

Job Summary

Thermal Engineers support the Spacecraft Development Program Managers and Chief Systems Engineer through the development of all spacecraft thermal system configurations, designs, analyses, testing, and flight operations. Spacecraft thermal subsystem elements includes all passive and active means of controlling the satellite’s system, subsystem, and component environments within both operating and survival limits during all pertinent system lifetime activities. Thermal engineers also have the opportunity to support MLI blanket design, fabrication, and installation.

This position’s internal job code is Mechanical System Design & Analysis Engineer. Our team is currently hiring for a level 3-4.

Responsibilities
  • Perform spacecraft thermal design and analyses at the board, component, subsystem, and system level
  • Develop systems and spacecraft element thermal models to predict thermal loads, impacts, and temperature margins to support system design
  • Brief design and analysis materials to program managers, customers, and/or sponsors
  • Identify all materials, processes, and facilities to achieve a qualified spacecraft thermal design and operation
  • Assists in proposal and new business development efforts
  • Support thermal verification testing on spacecraft systems and components including test design, test conduct, data reduction, analysis, and reporting
  • Support the development of tools to aide in conceptual designs and post-processing analysis
  • Potential to cross-train with MLI team for hands-on support
Minimum Qualifications
  • Bachelor of Science degree in Engineering (with a focus on Mechanical, Civil, Aerospace Aeronautical or Material Sciences)
  • 2 or more years of experience in the design, development, analysis, implementation, testing, and/or operation of spacecraft thermal systems or other related complex thermal systems
  • Proficiency with thermal analysis tools (e.g. Thermal Desktop, SINDA/FLUINT, ANSYS, Thermica)
  • Ability to obtain and maintain a TS/SCI Security Clearance
Preferred Qualifications
  • Active TS/SCI Clearance
Security Clearance and Export Control Requirements

This position must meet Export Control compliance requirements, therefore a “US Person” as defined by 22 C.F.R. §120.15 is required. “US Person” includes US Citizen, lawful permanent resident, refugee, or asylee. Minimum qualifications include compliance with Export Control Requirements. This position is located at a facility that requires special access.

Location and Working Hours

This position is expected to be 100% onsite. The selected candidate will be required to work onsite at one of the listed location options.

Total Rewards & Pay Range

Competitive base pay and variable compensation opportunities. Pay-Range Level3: $102,000 - $150,000 Level4: $124,100 - $182,500.

Benefits
  • health insurance
  • flexible spending accounts
  • health savings accounts
  • retirement savings plans
  • life and disability insurance programs
  • programs that provide for both paid and unpaid time away from work
Safety Sensitive

This is not a Safety Sensitive Position.

Visa Sponsorship

Employer will not sponsor applicants for employment visa status.

Contingent Upon Award Program

This position is not contingent upon program award.

Equality, Diversity and Inclusion

Boeing is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, national origin, gender, sexual orientation, gender identity, age, physical or mental disability, genetic factors, military/veteran status or other characteristics protected by law. EEO is the law. Boeing EEO Policy Request an Accommodation.

We’re committed to fostering an environment that’s welcoming, respectful and inclusive of every teammate, with great opportunity for professional growth.

Find your future with us.

Position Requirements
10+ Years work experience
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