Model Based Systems Engineer II

Position: Model Based Systems Engineer II 
Level: Mid

Location: San Diego, CA

Telework: Hybrid remote/onsite, with typical set schedule at Government facility

Travel: <10%

Salary: $111,700-$141,000 

XSITE LLC is looking for a Model Based Systems Engineer II 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 II to support systems engineering efforts through the application of Model Based Systems Engineering (MBSE) methods and tools. In this role, the successful candidate will develop and maintain system models, support technical analysis and architecture development, and collaborate across engineering teams to ensure models accurately reflect system requirements, design, and behavior. This position will also support work within collaborative digital engineering environments and contribute to 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) artifacts to support system requirements, design, analysis, and verification activities.


• Apply Systems Modeling Language (SysML) and/or Unified Modeling Language (UML) to create structured system models and related technical products.


• Support the development of system architecture products 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.


• Analyze system information and engineering data to support model development, system decomposition, and technical decision-making.


• Assistin the preparation of technical briefings, reports, and other engineering documentation related to MBSE activities and system architecture efforts.

Required Qualifications:

• Bachelor’s degree in Engineering, Operations Research, or another science discipline requiring the application of advanced mathematics skills, such as Business, Mathematics, Statistics, or Probability.


• Three (3) 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 holidaysannually, including New Year’s Day, Memorial Day, Independence Day, Labor Day, Veterans Day, Thanksgiving Day, and Christmas Day.


• 100% employer-paid employee coveragefor Medical, Dental, Vision, and Basic Life Insurance.Employees enrolled in XSITE’sHigh DeductibleHealth Plan (HDHP) are also eligible for aHealth Savings Account (HSA)with employer contributions.


• Eligibility toparticipatein XSITE’s401(k) retirement planwith up to a 6% employer match.


• Eligibility to receivetuition reimbursementofup to $5,250per year for job-related education.

• University of San DiegoEducation Benefitsof 10% tuition discount on select online degree programs and 25% discount on certificate programs.


• Cell Phone Stipend.


• Hybrid work environment.


• As well asemployeeadd on benefitsoffered via ADP.

Stability & Long-Term Growth 

• Prime contract holderwith long-term stability


• Mentor-Protégé JVpartnership with a major defense company

Career Advancement 

• Rapid growth (300% YoY) with opportunities forleadership and upward mobility.