Salary
$210k – $255k per year
Location
In office (El Segundo)
Seniority
Senior · 14+ years exp
Employment
Full-Time
Confirmed on the employer's own hiring board on Oct 28, 2026. First seen by Alion on Oct 27, 2026. Space Systems Integration scores B on the Alion truth index.
Overview
Company
Impact
Profile match
Headquartered in Chantilly, Virginia, Space Systems Integration (SSI) is an engineering consultancy that provides technical expertise and systems engineering services to the aerospace, intelligence, and defense sectors. The company specializes in spacecraft mission design, subsystem engineering, acquisition strategy, and detailed analytical trade studies for space programs. Additionally, it offers proprietary trajectory and attitude visualization software, project management, and proposal support to assist clients throughout the lifecycle of complex satellite missions.
SSI is seeking a Senior MBSE Engineer for a role in El Segundo, CA.
Role and Responsibilities include:
- Provide leadership advice on mission engineering strategies for SoS architectures and strategic messaging to key operational and government stakeholders.
- Provide systems engineering and mission architecting support.
- Technical requirements generation/review/compliance supporting space systems technical review and assessments.
- Develop mitigation plans for discovered and recorded Risks, Issues, and Gaps (RIGs) to provide senior leadership the information needed to close RIGs and vulnerabilities.
- Identify activities and functions critical to mission thread development, deriving and modeling the as-is and to-be functional and physical architectures.
- Provide program and technical insight to the modeling and analysis staff regarding system architecture designs, interfaces, schedule, and assumptions.
- Drive integration and utilization of Digital Engineering (DE) practices of Model-Based Systems Engineering (MBSE) and Modeling, Simulation, & Analysis (MS&A) to include the conversion of legacy Systems Engineering content into digital formats.
Required Qualifications:
- Bachelor of Science in Engineering or a relevant discipline with 14+ years of experience with:
- Systems engineering and architecting for major systems acquisitions utilizing Digital Engineering methodologies.
- Model-Based Systems Engineering (MBSE) methods and descriptive modeling frameworks such as SysML.
- Experience in Cameo Systems Architect or SparX Enterprise Architect.
- Understanding of DoDAF views for system of system architectures and plans.
- Modeling Simulation and Analysis (MS&A) experience in parametric and physics-based assessment of systems.
- Active TS clearance with in-scope T5/SSBI is required, along with SCI eligibility and participation in Continuous Evaluation.
- Must meet all requirements for SCI and SAP access and be willing to undergo a polygraph examination.
Desired Qualifications:
- Master’s Degree, 12+ years of relevant experience is preferred.
- Fluency in Department of War architectural frameworks (e.g., DoDAF).
- Military Space Operations with an emphasis in Space Domain Awareness and Combat Power programs and capabilities.
- Experience working in a development environment and/or U.S. Government weapons system program office.
- Led the development of a Digital Engineering Thread utilizing MBSE and MS&A artifacts, leading to a validated and verified system architecture.
- Professional certification (e.g., Professional Engineer, INCOSE CSEP, etc.).
- Knowledge of Digital Engineering and operational analysis processes and tools, as well as their application in producing data-driven analysis results.
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