TS/SCI Cleared - Senior Systems Engineer

At S5, we offer a leading-edge compensation package that includes top-tier salaries , up to 25% profit sharing into a qualified retirement account, flexible PTO , and company paid medical, vision and dental premiums for you and your family . You'll join a team of innovative engineers committed to innovation and excellence. We prioritize professional growth and team cohesion through technical trainings, team dinners, retreats, and an annual fully sponsored off-site. Our culture is built to support your career development, personal well-being, and long-term success.

S5 Analytics is seeking an experienced Senior Systems Engineer to support the design, development, and integration of advanced mission systems supporting the Intelligence Community and Department of Defense. This individual will serve as the technical bridge between customers, software development teams, and system stakeholders to translate operational needs into scalable technical solutions.

The ideal candidate is comfortable working in a collaborative Agile environment, engaging directly with customers, developing system requirements, and supporting the full systems engineering lifecycle-from concept development through integration, verification, and deployment. This role requires a strong systems-thinking mindset, excellent communication skills, and experience supporting mission-critical space, intelligence, or defense programs.

This position is contingent upon contract award.

Key Responsibilities

• Collaborate with government customers, stakeholders, and cross-functional engineering teams to define system capabilities and operational requirements.
• Develop and refine system requirements, concepts of operation (CONOPS), use cases, user stories, and technical documentation.
• Support Agile development activities including backlog refinement, sprint planning, capability decomposition, and requirements traceability.
• Assist in system architecture development, interface definition, and end-to-end system integration efforts.
• Partner with software developers and test engineers throughout implementation, verification, validation, and deployment activities.
• Participate in customer meetings, technical reviews, demonstrations, and design discussions.
• Produce and maintain technical documentation using collaborative engineering tools.
• Evaluate system performance and recommend improvements that enhance reliability, efficiency, and mission effectiveness.
• Support configuration management and systems engineering best practices throughout the development lifecycle.
• Travel occasionally to customer locations in support of technical meetings and program activities of up to 25%.

Required Qualifications

• Active Top Secret/SCI security clearance.