Spacecraft Thermal Engineer (Early Career) – Millennium Space Systems

The Boeing Company; El Segundo (CA); On-site; USD 63,000 - 134,000; Full time

Job summary

Millennium Space Systems seeks a Thermal Engineer to support the Spacecraft Development Program Managers and Chief Systems Engineer in designing, analyzing, testing, and operating spacecraft thermal systems. This role covers passive and active thermal control across all lifetime activities of the satellite.

You will develop thermal models to predict loads and margins, support system design, and verify with testing.

Qualifications

• Bachelor of Science degree in Engineering with focus on Mechanical, Civil, Aerospace/Aeronautical or Materials Sciences.
• 1+ years of experience in design, development, analysis, implementation, testing, or operation of spacecraft thermal systems or related complex thermal systems.
• 1+ years of experience with thermal analysis tools (Thermal Desktop, SINDA/FLUINT, Thermica).

Responsibilities

• Perform spacecraft thermal design and analyses at board, component, subsystem, and system levels.
• Develop thermal models to predict loads, impacts, and temperature margins for design support.
• Brief design/analysis results to program managers, customers, or sponsors.
• Identify materials, processes, and facilities to achieve qualified thermal design and operation.
• Support thermal verification testing including test design, data reduction, analysis, and reporting.
• Assist in proposals and business development efforts.

Skills

Thermal design

Thermal analysis

System-level thinking

Education

B.S. in Engineering

Tools

Thermal Desktop

SINDA/FLUINT

Thermica

Job description

Job Description

At Boeing, we innovate and collaborate to make the world a better place. We’re committed to fostering an environment for every teammate that’s welcoming, respectful and inclusive, with great opportunity for professional growth. Find your future with us.

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.

Position 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
• Support thermal verification testing on spacecraft systems and components including test design, test conduct, data reduction, analysis, and reporting
• Assist in proposal and business development efforts

This position’s internal job is Mech Sys Design & Anlys Engr. Our team is currently hiring for a Level 1-2 .

Basic Qualifications (Required Skills/Experience):

• Bachelor of Science degree in Engineering (with a focus on Mechanical, Civil, Aerospace Aeronautical or Material Sciences)
• 1 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
• 1 or more years of experience with thermal analysis tools (e.g. Thermal Desktop, SINDA/FLUINT, Thermica)
• This position requires the ability to obtain a US Security Clearance for which the US Government requires US Citizenship. A final U.S. clearance Post Start is required

Conflict of Interest:

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

Drug Free Workplace:

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.

Total Rewards:

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.

Summary pay range:

Level 1: $63,000 – $113,000

Level 2: $75,000 – $ 134,000

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

Applications for this position will be accepted until Nov. 02, 2026

Export Control Requirements:

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.

Export Control Details:

US based job, US Person required

Education

Bachelor’s Degree or Equivalent Required

Relocation

Relocation assistance is not a negotiable benefit for this position.

Security Clearance

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.

Visa Sponsorship

Employer will not sponsor applicants for employment visa status.

Shift

This position is for 1st shift

Equal Opportunity Employer:

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.

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.