Model Based Systems Engineer III

Salary Range: $147,000.00 To $195,000.00 Annually Position: Model Based Systems Engineer III Level: Senior Location: San Diego, CA Telework: Hybrid remote/onsite, with typical set schedule at Government facility Travel: <10% Salary: $147,000-$195,000 XSITE LLC is looking for a Model Based Systems Engineer III to join our team in San Diego, CA to support the PMW/A 170 office/contract. We are Service-Disabled Veteran-Owned company headquartered in San Diego. We provide full spectrum systems and systems-of-systems engineering and integration services and solutions for space, C5ISR, cyber and enterprise information systems. Our core capabilities include AI/ML, Software Development & Sustainment, Systems Engineering (including MBSE), and Modeling & Simulation. Position Overview: We are seeking a Model Based Systems Engineer III to support advanced systems engineering efforts through the application of Model Based Systems Engineering (MBSE) methodologies, tools, and digital engineering practices. In this role, you will develop and maintain system models, support architecture development and technical analysis, and collaborate with cross-functional teams to ensure models accurately represent system requirements, design, behavior, and interfaces. You will also contribute to work performed in collaborative MBSE/digital environments and support architecture products aligned with Department of Defense standards. Responsibilities of this position include, but are not limited to: Develop, maintain, and update Model Based Systems Engineering (MBSE) models and related engineering artifacts to support system requirements, design, analysis, integration, and verification activities. Apply Systems Modeling Language (SysML) and/or Unified Modeling Language (UML) to create structured system models and technical products. Support system architecture development using Department of Defense Architecture Framework (DoDAF) and/or Unified Architecture Framework (UAF) standards. Collaborate with cross-functional engineering teams in cross-platform collaborative MBSE and digital engineering environments to ensure consistency, traceability, and technical alignment across model artifacts. Analyze engineering data and technical information to support model development, system decomposition, interface definition, and technical decision-making. Assist in the preparation of technical briefings, reports, and other engineering documentation related to MBSE and architecture development efforts. Required Qualifications: Master’s degree in Engineering, Operations Research, or another science discipline requiring the use of advanced mathematics skills, such as Business, Mathematics, Statistics, or Probability. Ten (10) years of professional experience performing Model Based Systems Engineering. Knowledge of Systems Modeling Language (SysML) and/or Unified Modeling Language (UML). Experience working in cross-platform collaborative MBSE and/or digital engineering environments, or equivalent. Knowledge of the Department of Defense Architecture Framework (DoDAF) and/or Unified Architecture Framework (UAF). Secret Clearance or ability to obtain a secret clearance. Why XSITE LLC? Best-in-Class Benefits & Work–Life Balance Industry leading PTO package , starting at 15+ days annually. Seven (7) paid company holidays annually, including New Year’s Day, Memorial Day, Independence Day, Labor Day, Veterans Day, Thanksgiving Day, and Christmas Day. 100% employer-paid employee coverage for Medical, Dental, Vision, and Basic Life Insurance. Employees enrolled in XSITE’s High Deductible Health Plan (HDHP) are also eligible for a Health Savings Account (HSA) with employer contributions. Eligibility to participate in XSITE’s 401(k) retirement plan with up to a 6% employer match. Eligibility to receive tuition reimbursement of up to $5,250 per year for job-related education. University of San Diego Education Benefits of 10% tuition discount on select online degree programs and 25% discount on certificate programs. Cell Phone Stipend . Hybrid work environment. As well as employee add on benefits offered via ADP. Stability & Long-Term Growth Prime contract holder with long-term stability Mentor-Protégé JV partnership with a major defense company Career Advancement Rapid growth ( 300% YoY ) with opportunities for leadership and upward mobility.