Description ATSI is contingently seeking a Model Based Systems Engineer III to serve as a senior technical expert responsible for developing, integrating, and maintaining advanced system models in support of complex engineering programs at NSWC Crane. This role applies deep knowledge of MBSE methodologies, frameworks, and tools to enhance system design, validation, and lifecycle management across high-visibility projects. Key Responsibilities • Lead the development and implementation of MBSE architectures, models, and workflows for large-scale systems. • Apply expert knowledge of MBSE methodologies and frameworks to guide project teams and ensure modeling rigor and consistency. • Develop and refine system models using industry-standard MBSE tools and techniques. • Utilize Unified Modeling Language (UML) to represent system structures, behaviors, and interactions. • Collaborate with multidisciplinary engineering teams to translate system requirements into comprehensive models. • Review, validate, and verify system models to ensure traceability, accuracy, and compliance with program requirements. • Provide mentorship and technical leadership in MBSE best practices, modeling standards, and tool usage. • Support program reviews, technical documentation, and stakeholder communications using model-based artifacts. • Ensure model integration across program phases including requirements analysis, design, implementation, testing, and sustainment. Requirements • Bachelor’s degree from an ABET-accredited institution in Systems Engineering, Computer Engineering, Electrical Engineering, or related field. • Minimum of 10+ years of experience performing Model Based Systems Engineering in complex engineering environments. • Expert knowledge of MBSE methodologies, standards, and frameworks (e.g., SysML-based approaches). • Demonstrated expertise with MBSE tools such as Cameo/MagicDraw, Rhapsody, or equivalent. • Proficiency with UML for systems modeling and documentation. • Active SECRET clearance required. • Ability to obtain and maintain a TS/SCI clearance (TS/SCI preferred). Preferred Qualifications • Master’s degree or Doctorate in Systems Engineering or related discipline. • Experience integrating MBSE into digital engineering ecosystems. • Familiarity with DoD acquisition processes and technical reviews. • Experience leading complex model-based engineering initiatives. Our Company: American Technology Solutions International Corp. (ATSI) is a valued Veterans Affairs (VA) certified service-disabled veteran-owned small business (SDVOSB). We support multiple prime and subcontracts with Department of Defense (DoD), Intelligence, and Federal Government clients. ATSI provides program management, financial management, and technical support services to DoD S&T programs, to include technology transition and technology transfer programs and initiatives. Benefits: The ATSI benefits package includes: Direct Deposits & Allotments 11 Paid Federal Holidays Vacation & Sick leave Medical, Dental, Vision, and Prescription Insurance Virtual Doctor Visit Program for Employees & Dependents - unlimited number of visits at no cost Company Paid Short-Term and Long-Term Disability Insurance Company Paid Basic Life and AD&D Insurance Company Paid Parking and/or Transit Voluntary Life Insurance Program Flexible Spending Plans for healthcare, dependent care, & transportation Employee Assistance Program (EAP) Travel Assistance Program Education Reimbursement Program Pet Insurance AFLAC Grocery Delivery Service Fee Reimbursement 401(k) plan with company match and profit share options ATSI is an equal opportunity employer that does not discriminate against any employee or job applicant because of race, color, religion, national origin, sex, physical or mental disability, age, or any other status protected by applicable law.