{"id":3992143,"url":"https://alion.io/job/cesiumastro-senior-spacecraft-systems-engineer-software-4","title":"Senior Spacecraft Systems Engineer – Software","company":{"id":5315,"name":"CesiumAstro","domain":"cesiumastro.com","url":"https://alion.io/company/cesiumastro","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":85,"open_postings":39,"ghost_share":0,"stale_share":0.615,"repost_share":0,"time_to_fill_p50_days":47,"computed_at":"2026-11-09T06:03:00Z"}},"role":"Hardware","role_family":"Hardware","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Westminster, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":133908,"max":160991,"currency":"USD","period":"year","gross":null,"usd_annual":160991},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Bash","optional":false},{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"Git","optional":false},{"name":"Java","optional":false},{"name":"Python","optional":false},{"name":"TCP/IP","optional":false},{"name":"Unix","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-11-09T20:58:06Z","employer_posted_date":"2026-11-09","last_verified_at":"2026-11-09T23:49:25Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"The Senior Spacecraft Systems Engineer - Software is responsible for translating system-level operational concepts, customer requirements, and architecture into detailed software requirements, verification strategies, and integrated technical solutions for complex embedded systems. This role serves as a critical bridge between Systems Engineering and Software Engineering, ensuring requirements are properly decomposed, traceable, testable, and aligned to overall program objectives.\nThe position is organizationally aligned within the Systems Engineering function while working closely day-to-day with the Software Engineering team to support planning, development, integration, and verification activities. This role is instrumental in defining software verification approaches, required hardware/software configurations, and ensuring system functionality meets mission and performance objectives.\nESSENTIAL ROLES AND RESPONSIBILITIES\nRequirements Decomposition & Flow Down\nAnalyze customer, mission, and system-level requirements and decompose them into clear, verifiable software-level requirements.\nEnsure software requirements maintain traceability to higher-level system requirements, architecture, and Concept of Operations (CONOPS).\nCollaborate with systems, software, and hardware teams to refine requirements for completeness, feasibility, and technical accuracy.\nSupport requirements management processes, baseline control, and change impact assessments.\nIdentify requirement gaps, ambiguities, and risks early in the development lifecycle.\nVerification Planning & Validation\nDevelop software verification approach including verification descriptions, methods (test, analysis, demonstration, inspection), levels, and acceptance criteria aligned to system and program requirements.\nIdentify required verification configurations, including hardware setups, software loads, firmware versions, and test environments.\nSupport verification cross-reference matrices (VCRM), traceability matrices, and evidence packages.\nPartner with test and software teams to ensure efficient execution of planned verification activities.\nSystems & Software Integration\nServe as a technical liaison between Systems Engineering and Software Engineering teams.\nSupport software integration planning, readiness reviews, and release coordination.\nEvaluate impacts of software changes to system behavior, interfaces, and verification scope.\nParticipate in architecture, design, and interface reviews to ensure requirements alignment.\nSupport issue resolution involving system functionality, interoperability, and software performance.\nEmbedded Systems & Interfaces\nApply working knowledge of embedded systems architectures, constraints, and development environments.\nUnderstand hardware/software interfaces, communication protocols, and subsystem interactions.\nSupport interface definition and validation between embedded devices, processors, sensors, payloads, and external systems.\nAssess integration and verification implications of firmware, software, and hardware revisions.\nProgram Execution & Technical Leadership\nSupport Program Increment (PI) planning, staffing assessments, and execution readiness activities.\nPrioritize verification and requirements activities to meet schedule and milestone commitments.\nMentor junior engineers on requirements quality, traceability, and verification planning.\nDrive continuous improvement in systems/software collaboration, process efficiency, and engineering rigor.\nJOB REQUIREMENTS AND MINIMUM QUALIFICATIONS\nBachelor's degree in Systems Engineering, Software Engineering, Computer Engineering, Electrical Engineering, or related technical discipline with 5-8 years of experience in systems engineering, software engineering, embedded systems, or integration environments.\nExperience decomposing system requirements into software-level requirements.\nExperience creating verification plans, descriptions, procedures, or acceptance criteria.\nStrong understanding of embedded systems and software development lifecycles.\nExperience with hardware/software interfaces and communication protocols.\nAbility to interpret and apply system-level CONOPS to engineering execution.\nProgramming Languages: Python, C++, C, Java, Bash, or similar.\nDevelopment Tools: Git, IDEs, debuggers, CI/CD platforms.\nOperating Systems: Linux, Windows, Unix.\nProtocols/Interfaces: TCP/IP, UDP, Serial, USB, Ethernet, APIs.\nOther Tools: Requirements tools, issue tracking systems, automated test 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