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Staff Mechanical Engineer

CesiumAstro

Job Location:

Westminster, CA - USA

Yearly Salary: $ 133000 - 161000

Posted: 1 September 2026 (7 hours ago)

Application Deadline: 29 November 2026

Vacancies: 1 Vacancy

Job Summary

Please Note:To conform with the United States Government Space Technology Export Regulations the applicant must be a U.S. citizen lawful permanent resident of the U.S. conditional resident asylee or refugee (protected individuals as defined by 8 U.S.C. 1324b(a)(3)) or eligible to obtain the required authorizations from the U.S. Department of State.

AtCesiumAstro we are developers and pioneers of out-of-the-box communication systems for satellites UAVs launch vehicles and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment which allows us to learn develop and engage across our organization. If you are looking for hands-on interactive and autonomous work CesiumAstro is the place for you. We are actively seeking passionate collaborative energetic and forward-thinking individuals to join our team.

We are looking to add a Staff Mechanical Engineer to our team. If you enjoy working in a startup environment and are passionate about developing leading-edge hardware for satellites spacecraft and aerospace systems we would like to hear from you.

In this position you will be responsible for the mechanical design of CesiumAstro products through all phases of the development process. The ideal candidate will have extensive experience in electronics packaging design mechanical simulations and analyses computer-aided design (CAD) spacecraft mechanical interfaces and environmental qualification of electronic assemblies.

As a staff mechanical team member you will be responsible for mechanical designs from initial concept design through requirements definition detailed design simulation analysis manufacturing testing qualification and in-orbit support of CesiumAstros products. Required skills and experience include thermal management design precision machining principles thermal simulation and analysis shock and vibration simulation and analysis electromagnetic interference/compatibility (EMI/EMC) mitigation techniques geometric dimensioning and tolerancing (GD&T) finite element analysis (FEA) and cost analysis to develop validate and optimize mechanical designs. Principal engineers also serve as technical and professional mentors in their field.

The successful candidate will also present engineering design review materials to our customers and executive team as well as participate in proposal-writing efforts. As such excellent written and verbal communication skills are required.

JOB REQUIREMENTS AND MINIMUM QUALIFICATIONS

A Bachelor of Science (BS) or Master of Science (MS) degree in Mechanical or Aerospace Engineering from an accredited university or institution.
8 years of industry experience in design and analysis of electronics packaging including thermal vibration and stress dynamics.
Demonstratedexpertisein packaging high-power and high-density electronic assemblies.
Strong understanding of thermal management techniques for spaceborneand/orhigh-powerelectronics.
Experience designing hardware for launch and spaceflight environments(or similar).
Expertisein finite element analysis and thermal simulation tools (Ansys or similar).
Expert-level proficiency with professional mechanical CAD tools (SolidWorks or similar).
Experience with precision machining advanced manufacturing processes and tolerance analysis.
Experience with EMI/EMC mitigation techniques.
Strong understanding of GD&T and aerospace drawing practices.
Excellent written and verbal communication skills.

PREFERRED EXPERIENCE

Experience packagingdigitalpoweror RFprinted circuit board assemblies.
Experience with spacecraft payloads avionics or power systems.
Knowledge of NASA DoD ESA or commercial space qualification standards.
Experience with thermal vacuum testing and spacecraft environmental qualification.
Familiarity with materialsselectionfor radiationand outgassing environments.

$133000 - $161000 a year

CesiumAstro considers several factors when extending an offer including but not limited to the role and associated responsibilities a candidates work experience education/training and key skills. Full-time employment offers include company stock options and a generous benefits package including health dental vision HSA FSA life disability and retirement plans.

CesiumAstro is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard torace color religion sex national origin disability protected Veteran Status or any other characteristic protected by applicable federal state or local law.

Please note: CesiumAstro does not accept unsolicited resumes from contract agencies or search firms. Any unsolicited resumes submitted to our website or to CesiumAstro team members will be considered property of CesiumAstro and we will not be obligated to pay any referral fees.

We may use artificial intelligence (AI) tools to support parts of the hiring process such as reviewing applications analyzing resumes or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed please contact us.

Required Experience:

Staff IC

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