Senior Mechanical Engineer
$118k - $142kCesiumAstro
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 Senior Mechanical Engineer to our Mechanical Engineering team. If you enjoy working in a startup environment and are passionate about developing space hardware for leading-edge communications satellites, we would like to hear from you. In this position, you will be responsible for mechanical design aspects of Cesium phased array antennas, subsystems, and interfaces through all phases of the development process. The ideal candidate will be versatile and proficient in mechanical analysis, electronics packaging, computer-aided design (CAD), mechanical interfaces, thermal architecture, spacecraft propulsion, deployable and actuated structures, and environmental qualification of spacecraft antennas and payloads. You will be responsible for mechanical designs from concept through space flight including requirements definition, architecture trades and block diagrams, analysis, manufacturing, testing, qualification, and in-orbit support. 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 Bachelor of Science (BS) in Mechanical or Aerospace Engineering from an accredited university or institution Minimum of 4 years of experience in space antenna and payload mechanical engineering to include electronics packaging, thermal, shock, vibration, stress dynamics, and cost. A Master's degree may count as two years of experience. Experience in conducting architectural trade studies including parametric and first-order cost and physical analysis Experience with professional mechanical and FEA CAD tools, such as Ansys Mechanical, SolidWorks Simulation, and Thermal Desktop Experience with CNC manufacturing and GD&T Experience with advanced aerospace manufacturing and materials including sandwich panels and carbon composites, OR experience with high-reliability deployment mechanisms for space applications (including deployment, HDRMs, power delivery, etc.). Proficiency in detailed mechanical design (3D CAD, drawings, etc.) Experience designing and manufacturing mechanisms and mechanical actuators Experience with EMI/EMC mitigation techniques Familiarity with satellite thermal architectures including heat pipes, phase change materials, contact resistance, and surface finishes as well as fundamental understandings of orbital thermal control in a LEO environment. Familiarity with launch and LEO environments (thermal, shock, vibe, radiation, etc) Familiarity with design for test, manufacturability, assembly, and reliability Excellent written and verbal communication skills PREFERRED EXPERIENCE Python, C++, or other programming languages Experience with large, deployable antenna arrays which drive your vision for the next generation of on-orbit communications and sensor arrays. Robotics and control systems experience PCBA experience. $118,000 - $142,000 a year 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 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. #J-18808-Ljbffr CesiumAstro
- ...SpaceX is seeking a Mechanical Engineer for the Flight Termination System team in Hawthorne, California. This role involves designing explosive devices, ensuring hardware reliability through testing, and collaborating with cross-disciplinary teams. The ideal candidate...Senior
$158k - $219.45k
...practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that... ...in 2028.About the RoleRadiant is seeking a highly motivated Senior Mechanical Engineer, Turbomachinery (Rotordynamics) to join the team...SeniorFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$133.5k - $184.8k
...practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that... ...in 2028.About the RoleRadiant is seeking a highly motivated Senior Mechanical Engineer, Mechanisms to design and develop critical...SeniorFull timeSummer workImmediate startRemote workFlexible hoursWeekend work- ...and Mars. We are building one of the key enabling technologies that will make humans a multi-planet species, with a Senior/Principal Mechanical Engineer to own critical mechanical systems for Starpath’s Rover platform. In this role you will develop components from requirements...Senior
- ...Senior Mechanical Engineer - Test (Space Hardware) We are seeking a Senior Mechanical Engineer - Test to build and own the test and qualification infrastructure for next-generation hardware. This is a zero-to-one role -you will define how hardware is tested...Senior
- Northrop Grumman is seeking a Principal Engineer Mechanical (ITME) to join the Western Region Manufacturing and Operations team in Redondo Beach, CA. This in-person role requires an SCI clearance and involves coordinating across engineering, program management, and floor...Senior
$150k - $190k
...offices in Los Angeles, Washington D.C., San Francisco, San Diego, Seattle, and London. The Opportunity CHAOS is looking for a Senior Mechanical Engineer to serve as a technical authority for the design, integration, and qualification of electronic hardware and enclosures...Senior- ...We are looking to add a Senior Staff Mechanical Engineer to our team. In this role you will apply advanced mechanical engineering principles to develop and improve mechanical systems, structures, mechanisms, and hardware supporting complex products and platforms. This...Senior
$137k - $193k
...Senior Mechanical Design Engineer Playa Vista, California, United States Turning Space into a Transportation Layer for Earth Who We Are: Inversion builds advanced reentry systems to deliver next-generation capabilities from space. Our mission is to make Earth...SeniorPermanent employment$150k - $180k
...Learn More WHO WE ARE Durin builds and operates automated drill rigs to accelerate mineral discovery. BUILDING THE RIG As a Senior Mechanical Engineer at Durin, you will design and build the world's most advanced drill rigs, redefining mineral exploration as we know it,...SeniorWeekend work$115k - $136k
...Senior Mechanical Engineer page is loaded## Senior Mechanical Engineerlocations: El Segundotime type: Full timeposted on: Posted Yesterdayjob requisition id: 10012914**Job Description****Job Summary (General Responsibilities):**As a member of the Mechanical Engineering...SeniorWork experience placementWork at office$133.5k - $184.8k
...nuclear development leverages modern software engineering to rapidly deliver safe, factory-built... ...is seeking a highly motivated Senior Equipment Engineer who will be working closely... ...for fabricating and assembling complex mechanisms and structures. Design, analyze, and fabricate...SeniorFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$158k - $219.45k
...practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that... ...in 2028.About the RoleRadiant is seeking a highly motivated Senior Mechanical Engineer to own critical Kaleidos fluid systems from...SeniorFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$133.5k - $184.8k
...practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use... ...loads, vibration, and dynamic analyses for complex mechanical systems associated for Kaleidos, the world's first portable microreactor...SeniorFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$120k - $150k
...Rainmaker Mechanical Engineer Rainmaker is pioneering a modern cloud seeding system to solve water scarcity and inclement weather problems. We develop and incorporate radar validation, weather-resistant UAS, numerical weather modeling, and sustainable cloud seeds into...SeniorRemote work$146.4k - $219.6k
...Posted Wednesday August 19th, 2026 at 9:46 AM | Expires Thursday, December 31st, 2026 at 12:59 AM Position Summary: A Senior Mechanical Engineer in our Mission Critical practice will have the opportunity to design the most complex advanced building systems, prepares...SeniorFor contractorsCasual workWork at officeRemote workFlexible hours- Raytheon, based in El Segundo, CA, seeks a Sr. Mechanical Engineer for the Radar Antenna Design II section. You will engage in electronics packaging... ...documentation using CAD tools and close collaboration with senior engineers. Qualifications include ANSI drawing standards, GD...Senior
- SpaceX in Hawthorne, CA is seeking a Sr. Mechanical Engineer for Starship avionics. You will design instrumentation for extreme environments and drive mechanical design through 3D modeling, production drawings, and FEA analyses. Collaboration with shops and cross‑functional...Senior
- SpaceX seeks a Senior Mechanical Design Engineer to own the design of Starfall cargo structures, fluid systems, and components capable of withstanding extreme space environments. You will drive hardware from inception through launch and reuse, collaborating with leadership...Senior
$120k - $160k
...Senior Mechanical Design Engineer El Segundo, California A New Paradigm For Space Operations. Who We Are: Space Kinetic is a dual use space technology startup building a completely new architecture for space operations – one that brings the advantages of proliferated...SeniorPermanent employmentFlexible hours$137k - $193k
...Ventures, with customers across the U.S. government and commercial space industry. Position Overview As a Senior Mechanical Engineer at Inversion, you will own cradle to grave development of mission-critical hardware on one of the most capable reentry vehicles...SeniorPermanent employmentWork at office- Raytheon’s El Segundo, CA-based Airborne Radar Design department seeks a Principal Mechanical Engineer for the Radar Antenna Design II section. You will tackle electronics packaging for airborne subsystems including antenna, receiver, exciter, processor and power supply...Senior
$95.5k - $181.7k
...Senior Mechanical Engineer The Airborne Radar Mechanical Design Department is currently seeking a Senior Mechanical Engineer for the Receiver & Electronic Packaging Section in El Segundo, CA. The person in this position will be involved in electronics packaging...SeniorTemporary workWork experience placementRelocationFlexible hours- Durin Mining Technologies, Inc. is seeking a Senior Mechanical Engineer to design and build the world's most advanced drill rigs, taking projects from concept through production and global deployment. You will own mechanical system development, perform simulations and...Senior
$140k - $176k
...Francisco, San Diego, Seattle, and London. For more information, please visit Role Overview: CHAOS is seeking a Senior Mechanical Engineer to support the hands-on design, development, packaging, integration, and qualification of ruggedized sensor systems, avionics...SeniorFull timeWork experience placementCasual workRelocation package- Raytheon Technologies seeks a Senior Mechanical Engineer to join our Airborne Radar Design department in El Segundo, CA. This on-site role requires U.S. citizenship and an active DoD security clearance, providing technical support across the hardware life cycle for airborne...SeniorFlexible hours
$198k - $248k
...delivers advanced sensing and detection solutions that give the ultimate advantage: time. Role Overview CHAOS is seeking a Senior Staff Mechanical Engineer to lead the design, development, packaging, integration, and qualification of ruggedized electronic hardware, sensor...SeniorFull timeWork experience placementCasual workRelocation package- ...includes performing structural and thermal analysis, managing mechanical interfaces, and collaborating cross-functionally to optimize... ...Requirements Requires a Bachelor's degree in Mechanical or Aerospace Engineering with over 5 years of experience in aerospace or high-...Senior
$158k - $247.28k
Senior Mechanical Engineer - Turbomachinery Rotordynamics Lead the rotordynamics analysis and bearing selection for high-speed turbomachinery hardware Location: El Segundo, California, United States Compensation: $158,000 - 247,275 USD / year Job Tags: Hardware About...SeniorWeekend work- ...innovative structures and ensure flightworthiness through qualification campaigns. Requirements: Requires a Bachelor's degree in Mechanical Engineering and at least 5 years of experience designing aerospace structural hardware. Must possess strong knowledge of material...Senior
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior Mechanical Engineer. Be the first to apply!
- senior devops engineer remote El Segundo, CA
- senior implementation engineer El Segundo, CA
- senior marketer El Segundo, CA
- senior partner marketing manager El Segundo, CA
- senior information technology manager El Segundo, CA
- remote senior project manager El Segundo, CA
- senior payroll accountant El Segundo, CA
- american senior communities El Segundo, CA
- senior director it El Segundo, CA
- senior manager product engineering El Segundo, CA


