Space GNC Engineer

SSI is seeking a Space GNC Engineer to provide Systems Engineering and Technical Advisory (SETA) support to our customer in Chantilly, VA.

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This position requires experience with the full lifecycle of design, development, testing and operations of GNC capabilities for spacecraft. This individual will assist the government customer with requirements development, design oversight, trade studies, proposal evaluation, engineering change proposal development/evaluation, hardware procurement oversight, algorithm oversight, integration and test support, and flight operations of highly complex systems.

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Specific Duties May Include, but Not Limited to the Following:

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• Perform independent technical assessments of spacecraft GNC subsystem architectures throughout system design, integration, and test.
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• Evaluate contractor designs to ensure compliance with mission requirements, interface specifications, and system performance objectives.
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• Assess spacecraft attitude determination and control system designs, including sensor suites, actuator selection, redundancy approaches, and fault management strategies.
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• Review guidance, navigation, and control algorithms for technical soundness, implementation maturity, and operational suitability.
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• Assess risks, technical maturity, and performance margins across development and operational systems.
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• Work closely with operators, system engineers, and contractors to diagnose and resolve test and operational issues.
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• Ensure lessons learned from operations are fed back into system improvements.
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• Assist in developing customer positions, technical assessments, and decision briefings for leadership.
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Required Qualifications

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• Must possess an active Top Secret/SCI clearance and CI polygraph (polygraph within the last ten (10) years).
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• Master's degree in engineering and ten (10) or more years of experience.
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• Direct experience with space-based ACS subsystems and GNC.
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• Experience with all phases of the satellite mission lifecycle, from concept development and design through integration, testing, and post-launch operations.
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• Excellent interpersonal, leadership, team building and problem solving skills with a demonstrated ability to be effective in a Government/Contractor team environment.
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• Ability to communicate complex technical topics to Senior decision-makers with varying technical backgrounds through clear briefings and written reports.
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• Willingness to travel up to 10%.
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