Onsite Spacecraft Thermal Engineer — Mission Impact
$102k - $150kThe Boeing Company
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 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. Mission Operations Engineer As a Mission Operations Engineer, you will be the lead technical authority for Millennium’s on-orbit spacecraft. Your work will encompass the entire spacecraft mission life cycle, from the proposal phase to spacecraft and mission design, through space vehicle integration and test, and culminating with launch and on-orbit operations. You will be responsible for all facets of the mission design, including definition of operational concepts, development of on-orbit procedures, and innovation of advanced methods of spacecraft operation unique to each space mission. Mission Operations requires composure in high-pressure situations, in-depth knowledge of both the space vehicles and ground segment, and an ability to respond to anomalous scenarios in real-time. This position’s internal job code is Systems Engineer. Our team is currently hiring for levels 3-4. Mechanical System Design & Analysis Engineer 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 include 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 aid in conceptual designs and post-processing analysis. Potential to cross-train with MLI team for hands‑on support. Minimum Qualifications Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, Physics, or other relevant fields. 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. Shift and Location This position is expected to be 100% onsite. The selected candidate will be required to work onsite at one of the listed location options. This role will be on 1st shift. Security Clearance & Export Control Requirements This position requires the ability to obtain a U.S. Security Clearance. A TS/SCI Clearance is required and must be maintained. The position also requires compliance with U.S. export control regulations. A “U.S. Person” as defined under 22 C.F.R. §120.62 is required. Benefits At Millennium Space Systems, a Boeing Company, we strive to deliver a Total Rewards package that will attract, engage and retain the top talent. Total Rewards include competitive base pay, variable compensation opportunities, health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance, and paid and unpaid time away from work. Pay is based upon candidate experience and qualifications, as well as market and business considerations. Pay Range Level 3: $102,000 – $150,000. Level 4: $124,100 – $182,500. 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. Post‑offer applicants and employees are subject to testing for marijuana, cocaine, opioids, amphetamines, PCP, and alcohol when criteria are met as outlined in our policies. Relocation Relocation assistance is not a negotiable benefit for this position. Visa Sponsorship Employer will not sponsor applicants for employment visa status. 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. #J-18808-Ljbffr The Boeing Company
$151.3k - $226.9k
## Senior Spacecraft Thermal EngineerApplylocations: El Segundo... ...and aerospace engineers, VSD provides national... ...requiring at least 4 days onsite.**What You’ll Be... ...You will engage with impact with these internal and... ...or multiple-payload missions, anomaly and root-cause...SuggestedFull timeFor contractorsWork at officeImmediate startRemote workRelocation packageFlexible hours- An innovative aerospace company in Hawthorne, CA is seeking motivated interns to contribute to the development of spacecraft components. Interns will take on significant responsibilities similar to full-time team members, tackling challenges and participating in the design...SuggestedDaily paidFull timeInternship
- ...company in El Segundo is seeking a Senior Thermal Modeling Analyst. This role involves... ...Candidates should possess a bachelor’s degree in engineering or physics and have over 5 years of... ...The position is full-time and requires onsite presence. Benefits include stock options...SuggestedFull timeFlexible hours
- Spacecraft Thermal Engineer (Mid-Career) - Millennium Space Systems Company: Millennium Space Systems... ...on national security space. Our missions have direct impact to global security, like missile... ...position is expected to be 100% onsite. The selected candidate will be required...SuggestedPermanent employmentInterim roleCurrently hiringRelocationVisa sponsorshipWork visaRelocation packageFlexible hoursShift work
- Apex Technology, Inc. is seeking a Thermal Engineer to design and optimize thermal systems for spacecraft. The role focuses on modeling, testing, and cross-functional collaboration to enhance satellite thermal subsystems. Candidates should have experience in thermal modeling...Suggested
- ...highly-motivated and hands-on Senior Spacecraft Thermal Engineer to join our growing team. In this role... ...-level thermal stability and its impact on optical performance. Conduct FEA... ...software you need to do your best work. Mission-Driven Culture - Be part of a team working...Work at officeLocal areaRemote workFlexible hours3 days per week
- Pow.bio is seeking a Senior Thermal Modeling Engineer in El Segundo, CA, to lead thermal CFD analysis for the Kaleidos reactor systems. The role requires a Bachelor's degree in engineering or physics and over 5 years of experience with CFD tools like STAR-CCM+ and Ansys...Full timeFlexible hours
$139.5k - $224.7k
...leverages modern software engineering to rapidly deliver safe, factory... ...seeking a driven Senior Thermal Modeling Engineer with... ...to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits... ...Radiant compensates people for impact and invests in those who...Full timeSummer workImmediate startRemote workFlexible hoursWeekend work- A leading engineering company in El Segundo seeks a Senior Thermal Engineer with expertise in CFD and thermal FEA modeling. The role involves owning thermal CFD analysis, developing flow and heat transfer models, and collaborating with teams to enhance reactor systems....
- A leading engineering firm in California is seeking a Senior Thermal-Hydraulics Engineer to design and implement simulations for advanced microreactors. This role demands expertise in CFD and thermal FEA modeling, with responsibilities including executing thermal analysis...
- ...leverages modern software engineering to rapidly deliver safe, factory... ...beginning in 2028. Thermal Modeling Engineer (CFD) Radiant... ...to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits... ...Radiant compensates people for impact and invests in those who...Full timeSummer workImmediate startRemote workFlexible hoursWeekend work
- A leading aerospace manufacturer is seeking a Thermal & Vacuum Test Engineer in Redondo Beach, California. You will design and operate test systems for spacecraft components, ensuring reliability and performance under space-like conditions. The ideal candidate will have...
- A leading aerospace company in Redondo Beach, CA, is seeking a Thermal Engineer responsible for developing thermal models for spacecraft. You will collaborate with an agile team to implement effective thermal strategies. The ideal candidate has a Bachelor's in mechanical...
- A leading aerospace company in Redondo Beach seeks a skilled Thermal Engineer to manage thermal aspects of spacecraft. You are expected to develop thermal models, design management hardware, and collaborate with teams to improve spacecraft performance. A Bachelor's in...
$98.6k - $133.4k
...focused on national security space. Our missions have direct impact to global security, like missile... ...each one of us made it happen. Spacecraft Harness Engineer (Level 2 or Level 3) Location: El... ...position is expected to be 100% onsite. The selected candidate will be required...Permanent employmentWork experience placementFor subcontractorInterim roleLive inImmediate startRelocationVisa sponsorshipWork visaRelocation packageFlexible hoursShift workDay shift- A leading aerospace company in Hawthorne, California, is seeking a Thermal Engineer to develop robust thermal designs for spacecraft. You will build testing systems for validating performance and guide material selection for components. Ideal candidates will have experience...
$106.25k - $143.75k
...focused on national security space. Our missions have direct impact to global security, like missile... ...has an exciting opportunity for a Spacecraft Software Engineer (Level 2 or Level 3) to join our... ...position is expected to be 100% onsite. The selected candidate will be required...Permanent employmentWork experience placementInterim roleLive inCurrently hiringImmediate startRelocationVisa sponsorshipWork visaRelocation packageFlexible hoursShift workDay shiftAfternoon shift- Mission Operations Engineer (Mid Level) - Millennium Space Systems Company: Millennium... .... Our missions have direct impact to global security, like... ...for Millennium’s on-orbit spacecraft. Your work will encompass the... ...is expected to be 100% onsite. The selected candidate will...Permanent employmentFull timeInterim roleCasual workCurrently hiringRemote workRelocationVisa sponsorshipWork visaRelocation packageFlexible hoursShift workDay shift
- ...Torrance, CA is looking for an Automation and Controls Engineer to design and manage automation projects. The... ...essential. The role is on-site, providing an opportunity to work on impactful technology and to grow with a mission-driven team. #J-18808-Ljbffr Vital Lyfe, Inc.
- Pow.bio is seeking a Senior Thermal-Hydraulics Engineer in El Segundo, CA to design and implement simulations for the Kaleidos microreactor. This... ...in a relevant field. Compensation ranges from 139.5K to 224.7K, and the role is onsite full-time. #J-18808-Ljbffr Pow.bioFull time
- Apex Technology, Inc. is seeking a seasoned Electrical Engineer specializing in spacecraft to drive avionics and power systems design. You will lead... ...innovative projects in a fast-paced environment and join a mission to revolutionize access to space. With competitive...
$86.8k - $198k
Space Vehicle Systems Engineer Are you looking for an opportunity to... ...‑picture thinking to make an impact on national security? You... ...the right systems for their mission. Your ability to translate real... ...visit a customer facility. Onsite: If this position is listed as...Full timePart timeFor contractorsWork at officeLocal areaRemote work$86.8k - $198k
Space Vehicle Bus Systems Engineer Are you looking for an... ...thinking to make an impact in modernizing strategic... ...right systems for their mission. Your ability to... ...power, attitude control, thermal, propulsion, communications... ...customer facilities. Onsite - Primarily performed at...Full timeContract workPart timeFor contractorsCasual workWork at officeLocal areaRemote work- Impulsespace in Redondo Beach seeks a Chief Engineer (Spacecraft) to own the technical roadmap and ensure mission success for high-performance space vehicles. Responsibilities include managing system architecture, overseeing spacecraft lifecycle, and representing the company...Full time
$140k - $180k
...company in Los Angeles is seeking a talented RF Engineer to design innovative satellite communication systems. You will work on spacecraft architectures and drive hardware and... ...excellent benefits. Join a dynamic team making a real impact in aerospace. #J-18808-Ljbffr Apex- ...Angeles, is seeking an experienced industrial automation engineer to design and manage controls projects for... ...programming and familiarity with safety standards. Join a mission-driven team working on impactful technology in water security and climate resilience. This...
- The Boeing Company seeks a Spacecraft FPGA Engineer (Level 3) to join the Millennium Space Systems team in El Segundo, CA. You will design and... ...effectively in a cross-functional environment. It is strictly onsite and requires U.S. citizenship due to export control...
- Spacecraft Software Engineer (Associate or Mid-Level)- Millennium Space Systems Company: Millennium... ...on national security space. Our missions have direct impact to global security, like missile warning... ...position is expected to be 100% onsite. The selected candidate will be...Permanent employmentFull timeWork experience placementInterim roleLive inCurrently hiringImmediate startRelocationVisa sponsorshipWork visaRelocation packageFlexible hoursShift workDay shiftAfternoon shift
$125k - $175k
Impulse Space in Redondo Beach seeks a Spacecraft Testbed Engineer to design and operate testbeds for critical mission simulations. This role requires a Bachelor’s degree... ...integration and system validation, directly impacting mission success. The compensation ranges from...- Pow.bio is looking for a highly motivated Senior Tooling Engineer based in El Segundo HQ, California. This role involves working closely with design and manufacturing engineers to innovate and develop custom tooling for our microreactor system. The ideal candidate should...Full time
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Onsite Spacecraft Thermal Engineer — Mission Impact. Be the first to apply!


