Spacecraft Structures Test Engineer

Overview In this role you own the validation of flight hardware from first build to system-level tests, driving structural and mechanical validation across the spacecraft. You will collaborate with design, analysis, avionics, and manufacturing to translate test results into design improvements, and you will build and run campaigns that prove spacecraft performance in real environments. This is a hands-on, multidisciplinary position at a fast-growing aerospace startup. You will work with cross-functional teams to enable scalable, reliable spaceflight hardware and contribute to Apex’s mission to provide humanity access to space. Compensation / Benefitsequitycomprehensive healthcare for dependentsextensive PTO and holidays401(k) with matchparential leave and childcare reimbursementdaily catered lunch and snacks ResponsibilitiesOwn structural test strategy and execution across components, subsystems, and fully integrated spacecraftDevelop and operate fluid, hydraulic, and pressurized systems, including high-pressure and cryogenic environmentsDesign and integrate data acquisition and instrumentation (strain gauges, load cells, pressure transducers, thermocouples)Write and automate test procedures and scripts (primarily Python) for execution and data analysisLead test operations end-to-end, including setup, execution, and post-test reviewTroubleshoot hardware and drive root cause analysis on structural test failuresPartner cross-functionally with design, analysis, avionics, and manufacturing to close the loop between test results and design Key requirementsBachelor’s degree in mechanical, aerospace, or related engineering field3+ years of experience in spacecraft, launch vehicle, or complex structural testingBackground designing large-scale structural test stands or load application systemsStrong fundamentals in structural mechanics, including strength, stability, and fatigueExperience with structural analysis (hand calcs and/or FEM) and test correlationHands-on experience with instrumentation and lab equipment (strain, load, pressure, thermal measurements)Experience designing, building, or operating structural test systems and hardwareExperience with test automation and scripting (Python or similar)Ability to operate in fast-paced, high-ownership environments with evolving requirementsCross-functional collaborationStrong problem-solving and root-cause analysisAdaptability in a fast-paced startup environmentStructural testing and validationStructural dynamics, strength, fatigueFEM/hand calculations