Senior Systems Engineer

Modern Technology Solutions, Inc. (MTSI) is seeking a Senior Model-Based Systems Engineer (MBSE) to provide enterprise systems engineering, digital engineering, and modeling and simulation (M&S) support across the Missile Defense Agency's Chief Digital Office (CDO). This position supports one or more CDO mission areas - including Digital Innovation, Digital Development, the Next Generation Software Office, the Next Generation M&S Office, and the National Integrated Air & Missile Defense Center (NIC) - all of which focus on modernizing MDA's digital ecosystem and accelerating capability delivery. The selected engineer will leverage MBSE methods to enable digital transformation, integrate complex system architectures, support advanced M&S environments, and contribute to analysis, integration, automation, and experimentation activities that advance MDA's strategic digital objectives. Roles and Responsibilities

• Contribute as a key team member to the development, integration, and maintenance of modelbased system architectures that enable digital engineering, advanced M&S, and modernization activities across the CDO.
• Translate complex system, software, and M&S needs into structured MBSE artifacts that enhance traceability, decisionmaking, and technical clarity.
• Perform systems engineering activities including requirements analysis, architecture definition, digital workflow alignment, and technical risk identification.
• Support the evolution and integration of digital pipelines, tools, and modeldriven engineering environments to improve interoperability and mission readiness.
• Contribute to planning and execution of technical reviews, integration activities, experiments, and digital engineering events, providing modelbased insights and analysis.
• Engage with crossfunctional teams, technical stakeholders, and leadership to communicate engineering outcomes and ensure alignment with strategic digital objectives.
• Maintain configuration control and quality of MBSE artifacts, data, and digital engineering documentation throughout the system lifecycle.

• US citizenship and a Secret level clearance is required
• 10-15+ years of systems engineering experience with substantial MBSE leadership responsibilities.
• Expertise with Cameo/MagicDraw or equivalent MBSE toolsets.
• Experience supporting digital engineering, M&S, software integration, or system-of-systems architectures in DoD or MDA environments.
• Ability to communicate technical concepts clearly across multidisciplinary teams.
• Must be able to support on site requirements

Preferred Qualifications

• Master's Degree
• TS/SCI eligible

* Interesting Work: Our co-workers support some of the most important and critical programs to our national defense and security. * Values: Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry. * 100% Employee Owned: We have a stake in each other's success, and the success of our customers. It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year. * Great Benefits - Most Full-Time Staff Are Eligible for: * Starting PTO accrual of 20 days PTO/year + 10 holidays/year * Flexible schedules * 6% 401k match with immediate vesting up to $9k annually * Semi-annual bonus eligibility (July and December) * Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account * Up to $10,000 in annual educational reimbursement * Other company funded benefits, like life and disability insurance * Optional zero deductible Blue Cross/Blue Shield health insurance plan Track Record of Success: We have grown every year since our founding in 1993. Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide.