Spacecraft Dynamics Engineer

Spacecraft represent the most pressing unmet need across the entire aerospace industry. As more launch vehicles come online and the cost to orbit decreases, more companies launching payloads to space continue to emerge.For the first time in history, this influx of payload companies combined with reduced launch costs has resulted in a massive increase in need for commercial spacecraft platforms, known as satellite buses. These buses hold the payloads of our customers and are flown on launch vehicles.Apex manufactures these satellite buses at scale using a combination of software, vertical integration, and hardware that is designed for manufacturing. Our spacecraft enable the future of society: ranging from earth observation to communications and more.We'd love for you to join us on our mission of providing humankind access to the galaxy beyond our planet.About the RoleApex is looking for a Spacecraft Dynamics Engineer to own dynamic analysis and vehicle response across our spacecraft. This role is responsible for predicting and validating how our hardware behaves across all phases of flight, from ground and launch environments through on-orbit operations. You'll work across structures, test, and systems teams to ensure our vehicles are robust to vibration, shock, acoustics, and coupled loads.Responsibilities:Own dynamic and loads analysis across components, subsystems, and full spacecraftExpertise in CLA, load derivation and structural verificationDevelop load cases and environmental requirements (quasi-static, random vibration, shock, acoustics)Predict vehicle response across launch, deployment, and on-orbit conditionsPerform structural dynamics analyses using FEM and analytical methods to evaluate loads, margins, and system behaviorBuild and assemble coupled system models across spacecraft and launch vehicle interfacesPlan and execute dynamic test campaigns, including vibration and mode survey testing, from setup through data validation and model correlationProcess and analyze test and flight data to validate models and improve prediction accuracyEvaluate analytical predictions against test and flight data and drive improvements to loads methodologiesDevelop internal tools and workflows (Python, MATLAB, or similar) for simulation, data processing, and signal analysisPartner cross functionally with design, test, and manufacturing teams to influence hardware and ensure requirements are metProvide technical leadership on complex dynamics problems and mentor more junior engineersRequirements:Bachelor's degree in mechanical, aerospace, or related engineering field1+ years of experience in structural dynamics, loads, or environment predictionStrong fundamentals in vibration, shock, transient response, and frequency-domain analysisExperience with finite element modeling and analysis (NASTRAN, FEMAP, or similar)Strong background in linear algebra, numerical methods, and dynamic system modelingExperience with telemetry, test, or flight data processing and correlationExperience developing simulation tools and performing high-speed data and signal processingAbility to communicate complex dynamics concepts clearly across engineering teamsProven ability to operate in fast-paced, high-ownership environments Nice to have:Experience with spacecraft or launch vehicle coupled loads analysisHands-on experience with vibration, shock, or mode survey testingFamiliarity with industry standards (GSFC, MIL-STD, etc.)Experience with flexible body dynamics or separation eventsExperience building internal tools or automating analysis workflows Why Join Apex? Apex believes in creating a work environment that you look forward to embracing every day. Our employees love working at Apex, and we want you to love it too. We're a fast-growing startup backed by $200M in Series D funding, and we invest heavily in our people from day one. What We Offer For Full-time Employees:Shared upside: Receive equity in Apex, letting you benefit from the work you createBest-in-class healthcare: 100% company-paid medical, dental, and vision for you and your dependents, plus $100k life insurance at no costComprehensive PTO package to reset and recharge - starting at 15 days vacation, growing to 20+ days annually, plus 10 paid holidaysCompetitive 401(k) plan with generous matching - 100% match on first 3%, 50% on next 2%8 weeks paid parental leave plus childcare reimbursement up to $350/day for work-related travelDaily catered lunch and unlimited snacks to keep you fueled throughout the dayVibrant community: Monthly office socials, pickleball tournaments, run club, and gatherings for you and your familyYour dream desk setup and all the tools you need to be your most productive selfWorld-class Playa Vista office with the benefit of in-person collaboration with amazing coworkers and flexibility to integrate work and lifeReal impact opportunity: Work alongside experts from aerospace, new space, and other cutting-edge industries to make a lasting difference Ready to join a team where your contributions matter and your future is bright? Let's build something extraordinary together. Equal Opportunity Employer Apex Technology, Inc. is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Candidates and employees are always evaluated based on merit, qualifications, and performance. We will never discriminate on the basis of race, color, gender, national origin, ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.