Millennium Space Systems Summer 2026 Internship Program –Thermal Engineering

Boeing • El Segundo, CA

1d • $21 - $31 • Onsite

About The Position

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. The thermal engineering intern at Millennium Space Systems will support thermal analysis and test efforts for our spacecraft and avionics. This will include using thermal analysis software to build, validate, and run thermal models, as well as oversee test planning, setup, execution, and report generation. The thermal engineering intern will support one or more of our active satellite programs, contributing to our company goal of delivering advanced satellite constellations to our customers. Over the course of our 10-12 week internship experience you will have the opportunity to: Build, validate, analyze, and post-process thermal models in Thermal Desktop / SINDA Plan, setup, execute, and generate post-test reports for thermal vacuum (TVAC) testing of spacecraft components Support Thermal Vacuum testing of Spacecraft (SCTV) Assist program Thermal Responsible Engineering Authorities with documentation and model post-processing Attend team and program meetings, provide status on project(s) to appropriate stakeholders This position is expected to be 100% onsite. The selected candidate will be required to work onsite at one of the listed location options. These positions 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. Additionally, some positions may require the ability to obtain U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship.

Requirements

• Ability to work full-time for 10-12 weeks during Summer 2026
• Basic understanding of thermodynamics, heat transfer (with focus on conduction and radiation)
• Pursuing a degree in an Engineering field (ex: Mechanical, Aerospace, Chemical, Energy, Materials, etc.)
• Proficiency in at least one CAD software (SolidWorks, AutoCAD, etc.), and MS Office Products (Excel, PowerPoint, etc.)
• Enrolled student attending a college or university with an expected graduation date on or after August 2026
• These positions 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.
• Additionally, some positions may require the ability to obtain U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship.

Nice To Haves

• Strong academic performance (preferred GPA of 3.0 or above)
• Exceptional organizational and collaboration skills as demonstrated through leadership positions on teams and/or in student or civic organizations
• Strong technical experiences as demonstrated through technical projects, research or engineering internships
• Exceptional communication skills and interest and enthusiasm related to engineering, aerospace and a career with Boeing
• Junior or Senior class standing
• Successful candidates for this job must satisfy the Company’s Conflict of Interest (COI) assessment process.

Responsibilities

• Build, validate, analyze, and post-process thermal models in Thermal Desktop / SINDA
• Plan, setup, execute, and generate post-test reports for thermal vacuum (TVAC) testing of spacecraft components
• Support Thermal Vacuum testing of Spacecraft (SCTV)
• Assist program Thermal Responsible Engineering Authorities with documentation and model post-processing
• Attend team and program meetings, provide status on project(s) to appropriate stakeholders

Benefits

• 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.

What This Job Offers

• Job Type: Full-time
• Career Level: Intern
• Education Level: No Education Listed