27d ago

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

United StatesUnited States·Usa - El Segundosenior
OtherThermal Engineer
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Overview

Spacecraft Thermal Engineer (Mid to Senior Career) - Millennium Space Systems Company:Millennium Space Systems Job Description Millennium Space Systems, a part of Boeing Defense,

Technical Tools
OtherThermal Engineer
Spacecraft Thermal Engineer (Mid to Senior Career) - Millennium Space Systems

Millennium Space Systems

Job Description

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.

Responsibilities

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    Perform spacecraft thermal design and analyses at the board, component, subsystem, and system level 

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    Develop systems and spacecraft element thermal models to predict thermal loads, impacts, and temperature margins to support system design

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    Brief design and analysis materials to program managers, customers, and/or sponsors

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    Identify all materials, processes, and facilities to achieve a qualified spacecraft thermal design and operation

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    Assists in proposal and new business development efforts

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    Support thermal verification testing on spacecraft systems and components including test design, test conduct, data reduction, analysis, and reporting 

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    Support the development of tools to aide in conceptual designs and post-processing analysis

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    Potential to cross-train with MLI team for hands-on support

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

Requirements

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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.

  • 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 

  • Active TS/SCI Clearance

Not Applicable

This position must meet U.S. export control compliance requirements. To meet U.S. export control compliance requirements, a “U.S. Person” as defined by 22 C.F.R. §120.62 is required. “U.S. Person” includes U.S. Citizen, U.S. National, lawful permanent resident, refugee, or asylee.

Successful candidates for this job must satisfy the Company’s Conflict of Interest (COI) assessment process

Millennium Space Systems, a Boeing Company, is a Drug Free Workplace (DFW) where post offer applicants and employees are subject to testing for marijuana, cocaine, opioids, amphetamines, PCP, and alcohol when criteria is met as outlined in our policies.

  • This role will be on 1st

Shift 1 (United States of America)

At Millennium Space Systems, a Boeing Company, we strive to deliver a Total Rewards package that will attract, engage and retain the top talent.  Elements of the Total Rewards package include competitive base pay and variable compensation opportunities.  

Millennium Space Systems also provides eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance programs, and a number of programs that provide for both paid and unpaid time away from work.  

The specific programs and options available to any given employee may vary depending on eligibility factors such as geographic location, date of hire, and the applicability of collective bargaining agreements.

Pay is based upon candidate experience and qualifications, as well as market and business considerations.

  • Level 3: $102,000 - $150,000 

  • Level 4: $124,100 - $182,500

Millennium is DDTC-registered, ITAR-compliant Company. This position is located at a facility that requires special access. Applicants MUST be U.S. citizens and eligible for a security clearance. Additionally, applicants must be willing to apply for and maintain a security clearance. We encourage all interested candidates to apply for any open position for which they feel they are qualified.

Category = Engineering

Bachelor's Degree or Equivalent

Relocation assistance is not a negotiable benefit for this position.

This is not a Safety Sensitive Position.

This position requires the ability to obtain a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship. An interim and/or final U.S. Secret Clearance Post-Start is required.

Employer will not sponsor applicants for employment visa status.

This position is not contingent upon program award

Location & Eligibility

Where is the job
Usa - El Segundo, United States
On-site at the office
Who can apply
US

Listing Details

Posted
September 11, 2026
First seen
September 28, 2026
Last seen
October 8, 2026

Posting Health

Days active
9
Repost count
0
Trust Level
19%
Scored at
October 8, 2026

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