Mechanical Engineer II

CesiumAstro

CesiumAstro

Software Engineering

El Segundo, CA, USA

Posted on May 19, 2026
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.
At CesiumAstro, 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 Mechanical Engineer II 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 mechanical designs of Cesium products through all phases of the development process. The ideal candidate will be proficient in electronics packaging design, mechanical simulations and analyses, computer-aided design (CAD), aircraft mechanical interfaces, and environmental qualification of electronic assemblies (MIL-STD-810 and DO-160G).

As a Cesium 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 field support of Cesium's 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, environmental compatibility analysis, geometric dimensioning and tolerancing (GD&T), finite element analysis (FEA), and cost analysis to develop, validate, and optimize mechanical designs.

The successful candidate will also present engineering design review materials to our customers and leadership team. As such, excellent written and verbal communication skills are required.

JOB REQUIREMENTS AND MINIMUM QUALIFICATIONS

  • Bachelor of Science (BS) or Master of Science (MS) degree in Mechanical or Aerospace Engineering from an accredited university or institution.
  • Minimum of 2 years of industry experience in design and analysis of avionics or ruggedized embedded electronics packaging, including thermal, vibration, and stress dynamics or in aircraft structures and mechanisms.
  • Familiarity with electronics assemblies and experience working closely with electrical engineers.
  • Experience with CAD software packages, such as SolidWorks.
  • Experience with professional mechanical and FEA CAD tools, such as Ansys.
  • Experience with CNC manufacturing.
  • Experience with EMI/EMC mitigation techniques.
  • Excellent written and verbal communication skills.

PREFERRED EXPERIENCE

  • Aerospace industry design, development, and qualification.
CesiumAstro considers several factors when extending an offer, including but not limited to, the role and associated responsibilities, a candidate’s 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 to race, 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.

100000 - 121000 USD a year

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