Skip to content

Mechanical

Spacecraft Mechanical Engineer (Experienced)

Millennium Space Systems logoMillennium Space SystemsEl Segundo, CAFull timePosted 3d ago
  • US citizenship
  • ITAR / US person
  • TS/SCI clearance
  • Secret clearance

How this pay compares

This posting does not state its pay. Open mechanical engineer jobs in California post a median of $158k a year, the middle half $130k–$180k, across 266 jobs that state their pay.

Mechanical engineers in California: pay by town and employer

About the job

Spacecraft Mechanical Engineer (Experienced) - Millennium Space Systems ## Company 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. ## Job Summary As an experienced Spacecraft Mechanical Engineer, you will leverage past experience and strong engineering fundamentals to solve our most challenging technical problems in collaboration with other engineers. You will review designs and test plans to validate planning and identify opportunities to reduce cost and risk.

Additionally, you will create processes, standards, and engineering tools that are needed and train others in their use. This is an exciting opportunity to drive the development of emerging technologies for future mechanical designs at Millennium. This position’s internal job code is Mech Sys Design & Anlys Engr.

Our team is currently hiring for the Levels 5-6. ## Responsibilities - Help set technical direction for the group and beyond - Identify and create essential processes, tools, standards, and design guides to build a knowledge-base and set best-practices - Support Responsible Engineering Authorities (REAs) as needed to solve technical challenges, identify solutions, and develop verification tests - As part of the team’s technical lead engineering (TLE) group, provide technical guidance to programs on an as-needed basis though activities such as attending design reviews and customer meetings, failure review and analysis, and trade study assessment - Audit internal programs and external suppliers to identify industry best practices and opportunities for improvement - Serve as a technical mentor for mid-career mechanical engineers This position is expected to be 100% onsite.

The selected candidate will be required to work onsite at one of the listed location options. ## 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 - 12+ years of technical experience in design and analysis of aerospace hardware - Adept with CAD software such as SolidWorks or similar, and GD&T per ASME Y14.5 - Experience with spacecraft environments and testing, including random, sine, and acoustic vibration tests, and TVAC testing - Strong mechanical engineering fundamentals, knowledge of satellite hardware, qualification methods, and first principles understanding of all spacecraft sub-systems - Bachelor of Science degree in Engineering (with a focus on Mechanical, Civil, Aerospace Aeronautical or Material Sciences) - 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 ## Preferred Qualifications - Excellent interpersonal and communication skills, both written and verbal - Experience with any of the following: composites, bonded joints, dampers, additive manufacturing, shock or mechanisms - Master's degree in Mechanical Engineering, Aerospace Engineering, or a related field from an accredited university - Active TS/SCI Clearance ## 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. ## Shift - This role will be on 1st ## 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 Please note that the salary information shown below is a general guideline only of what is reasonably expected to be paid for the position.

Salaries are based upon candidate experience and qualifications, as well as market and business considerations. - Level 5: $146,200 - $215,000 - Level 6: $178,500 - $262,500 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 ## Language Requirements Not Applicable ## Education Bachelor's Degree or Equivalent ## Relocation Relocation assistance is not a negotiable benefit for this position. ## Export Control Requirement 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. ## Safety Sensitive This is not a Safety Sensitive 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. ## Contingent Upon Award Program This position is not contingent upon program award ## Shift Shift 1 (United States of America) Stay safe from recruitment fraud! The only way to apply for a position at Boeing is via our Careers website.

Learn how to protect yourself from recruitment fraud - Recruitment Fraud Warning 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 Applicant Privacy ## Boeing Participates in E – Verify - E-Verify (English) - E-Verify (Spanish) ## Right to Work Statement - Right to Work (English) - Right to Work (Spanish)

From Millennium Space Systems's job posting, checked 7 Nov 2026. The employer's own page is the final word on requirements and availability.

Selected agencies hiring now

  • NESC Staffing (Nesco Resource)Engineering and technical staffing agency

    Engineering and technical staffing firm placing engineers, designers, technicians and manufacturing staff on contract and direct hire.

    Places: Mechanical, Avionics, Systems & Test, Technicians

  • Chipton-RossEngineering and technical staffing agency

    Aerospace and defense engineering staffing firm with offices in El Segundo, Long Beach and Playa Del Rey, California, Charleston, Pascagoula and Newport News, placing engineers, designers and technicians on contract and direct hire.

    Places: Mechanical, Avionics, Systems & Test, Technicians

These agencies and apps pay SpaceJobs.Now a referral fee when someone we introduce is placed or signs up. It costs you nothing and never changes your pay. Employers' own jobs below keep their own order.

Sponsored

Sponsored jobs from job networks, which pay SpaceJobs.Now when you click one.

Free tools for this application: check your resume against this job, answer the application's questions or see every free tool.

New mechanical, structures and thermal engineering jobs in space in California, by email

One email a week with the newest ones, straight from the employers' own careers sites, with the pay each posting states. Free, stop anytime.

About Millennium Space Systems

Builds small satellites for missile warning and tracking, a Boeing company since 2018.

Pay on its listings: 93.9% of its open jobs state an hourly rate

How it pays: Paid as an employee of Millennium Space Systems, under the employment terms each posting states.

More open jobs at Millennium Space Systems

More mechanical, structures and thermal engineering jobs in space

A mechanical, structures or thermal engineer?

One profile for every employer here. Space companies and their recruiters ask us for people with a specific degree, clearance, specialty or location: add yours once, and when a job fits, we introduce you, only with your yes. Free.

Create my profile

Millennium Space Systems openings, sent to you weekly

Each week we send the newest postings from Millennium Space Systems's own careers site, along with similar openings at other space employers. It costs nothing and you can stop anytime.