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OUR COMPANY As an early mover in the in-space transportation and infrastructure services, Momentus is at the forefront of the commercialization of space. With an experienced team of aerospace, propulsion, and robotics engineers, Momentus has developed a cost-effective and energy-efficient in-space transport system.  OUR PEOPLE Daring problems require daring solutions.  We boldly charge into uncharted territory knowing that no matter the outcome we will benefit from the journey and move closer to our goals no matter what. Our teams know that working at Momentus means more than building innovative technology, it means creating entirely new markets in the space economy. We are level-headed, business-minded strategic thinkers intent on providing immediate value to our customers today while simultaneously preparing for the vast possibilities of the future. If this sounds like you, we should talk. JOB SUMMARY As the Staff Mechanical Design Engineer, you will serve as the mechanical technical authority for our spacecraft, leading hardware development from early concept through production deployment.  This role will c ollaborate cross-functionally with Electrical, Systems, Manufacturing, and Supply Chain teams to deliver integrated hardware solutions. The ideal candidate should be accustomed to working in a fast-paced environment and quickly adapting to new challenges.   Key Responsibilities   Own subsystem-level mechanical solutions, ensuring performance in demanding thermal and high-vibration environments   Represent the mechanical discipline in internal and external design reviews and customer engagements   Support hardware integration, verification, and production readiness activities within secure program environments   Work with structural analysts to ensure structural integrity of the spacecraft and all components during all phases of launch   Work with thermal analysts to ensure all components are maintained within acceptable temperature limits   Conduct mechanical testing of systems and components including vibration testing, static load testing, and shock testing   May be asked to support TVAC testing on an as-needed basis   Required Skills and Experience   Demonstrated experience with detailed  mechanical design, including technical subcontractor and vendor collaboration Proficiency in CAD software (e.g., SolidWorks)   Strong understanding of structural analysis techniques, including finite element analysis (FEA) and hand calculations   Strong understanding of drafting standards such as GD&T   Experience defining requirements for mechanical systems and components.   Familiarity with the space environment and how it affects mechanical hardware   Familiarity with material selection and material coatings for space applications   General understanding of spacecraft structural loads (quasi-static loads, random vibration, shock, thermo-mechanical)   Ability to work independently   Excellent technical communications skills   Good written and verbal communications skills   Desired Skills and Experience:   Experience designing, manufacturing, and testing space hardware with demonstrated on-orbit success   Experience running structural vibration testing   Experience running TVAC tests   Structural and/or thermal analysis experience   Previous experience working on DoD and other USG development and deployment programs   Ability to hold and maintain a USG Security Clearance   Education & Work Experience:   BS degree in Mechanical Engineering, or a closely related discipline   12-15+ year relevant experience