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Senior Mission Integration Engineer - Payload I&T

Apex - Los Angeles, CA, United States - In-office - posted 2026-10-16

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Apex manufactures satellite buses (spacecraft platforms) at scale for commercial space missions. The company combines software, vertical integration, and hardware design to enable payloads ranging from earth observation to communications. You will join the Mission Integration team as a Senior Mission Integration Engineer specializing in Payload Integration & Test. This is a hands-on role that owns the planning and execution of customer payload integration and space vehicle (SV) level test campaigns. Key Responsibilities: • Lead planning and execution of space vehicle I&T campaigns on the cleanroom floor • Lead customer technical engagements to develop bus-to-payload integration procedures • Plan and execute SV-level environmental testing (random vibration, quasi-static load, TVAC) • Plan and execute SV-level functional testing to demonstrate integrated vehicle functionality • Lead space vehicle propulsion load operations for dynamic testing and launch • Review coupled loads analysis (CLA) and thermal analysis results for test planning incorporation • Travel to launch sites for vehicle integration, system checkouts, and launch rehearsals • Develop and maintain customer system-level documentation (specifications, interface control documents, system design descriptions) • Support requirements analysis, verification, and validation activities for customer compliance and industry standards • Identify and assess technical risks in system design, development, and operation • Collaborate with multidisciplinary teams (electrical, mechanical, software engineers) on system integration and performance • Communicate technical concepts, requirements, and issues to technical and non-technical stakeholders • Participate in customer meetings, design reviews, and project status updates Requirements: • U.S. Person status (required for access to export-controlled data under ITAR) • Bachelor's degree or higher in Aerospace Engineering, Mechanical Engineering, Electrical Engineering, or related field • 8+ years of experience working on complex hardware systems (spacecraft preferred) • Experience in satellite manufacturing or related industries (aerospace, defense, or high-tech) • Strong understanding of space systems integration and test • Experience coordinating cross-functional teams and managing timelines in fast-paced environments • Strong communication and organizational skills with ability to prioritize and adapt to shifting demands • High attention to detail with focus on delivering concise and technical review content Preferred Qualifications: • Previous spacecraft, launch vehicle, or payload engineering experience • Experience with CubeSat, small satellite, or rideshare mission integration • Experience working with prime contractors or government entities • Familiarity with flight software, embedded systems, and space communications protocols (CCSDS, S-band, X-band)

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