As a Multi-Level Ecosystem Integration Engineer with MTSI, you will provide technical support for programs, processes, and capabilities within the Assistant Secretary of Defense for Mission Capabilities (ASD(MC)) within the Office of the Under Secretary of Defense for Research and Engineering (OUSD(R&E)). Work locations are at the Mark Center in Alexandria, VA, and at the Pentagon. Your primary responsibilities are to: Architect secure, scalable, and resilient hybrid-cloud solutions capable of supporting multi-level security and multi-domain operations. Leverage hybrid and multi-cloud technologies (AWS, Azure, Google Cloud, or DoD-specific cloud environments such as GovCloud or milCloud). Employ technologies such as cross-domain solutions (CDS), security enclaves, and Zero Trust Architecture principles. Lead the integration of MLS architectures into operational systems by defining interfaces and ensuring compatibility across hardware, software, and network domains. Work alongside system engineers, network administrators, and software developers to enable seamless cloud adoption while meeting mission requirements. Coordinate with stakeholders and leverage available tools, processes, and forums to proactively facilitate requirements development, implementation, and sustainment of information technology (IT) capabilities supporting OUSD(R&E) MC personnel. Assist in technology concept development; modeling, simulation, and analysis (MS&A); and IT infrastructure activities necessary to support the advancement of warfighter capability development. Contribute to the integration of advanced modeling and simulation (M&S) capabilities to assess future concepts, test operational hypothesis, and inform Joint CONOPS integration. Assist in the execution of administrative functions such as budgeting, project management, contracting, and other complementary activities, ensuring OUSD(R&E) MC IT initiatives contribute to OUSD(R&E) MC mission success. Assist in the development of work products supporting inquiries from US Congressional representatives. Ensure compliance with DoD cybersecurity frameworks, including RMF (Risk Management Framework), DISA STIGs, and NIST 800-53 requirements. Develop migration strategies for transitioning legacy systems and data into MLS-compliant cloud environments. Create technical documentation, including architectural diagrams, implementation guidelines, and standard operating procedures (SOPs). Generate regular progress reports and metrics for program leadership and stakeholders. Evaluate emerging technologies for cloud infrastructure, MLS systems, and cybersecurity enhancements. Recommend innovative solutions to strengthen mission readiness and optimize lifecycle management in the cloud environment. Qualifications 10+ years of relevant work experience. Exposure to MS&A processes, workflows, designs of experiment, execution plans, and results reporting associated with Joint, all-domain warfighting concepts, such as kill chain operations, platform and system models, scenario generation and execution, trade studies, and sensitivity analysis. Previous experience with IT at various classification levels (SAP-level is desired). Working knowledge and understanding of current DoD IT Policy and Directives. Experience establishing and leading cross-functional stakeholder teams, particularly teams consisting of cybersecurity, software development, operational research (OR), and business operations personnel. Experience with advanced computing solutions such as high-performance computing (HPC), cloud computing, and similar distributed computing architectures. Experience performing duties in highly classified environments, respecting the challenges and opportunities offered by such environments. Familiarity with computing system infrastructure implementations, including data centers, networks, help desk support operations, and commercial vendor relations. Experience planning and executing systems analysis efforts for the DoD and/or IC. Highly effective communication and interpersonal skills. Ability to develop high-quality, professional briefings and written reports to succinctly capture key issues for DoD decision-makers. Self-starter, able to take initiative and accomplish work independently with minimal guidance. Must be highly organized with strong attention to detail. 3 years’ prior experience for access to Special Access Program Information (SAP), or Controlled Access Program (CAP); must have 1 year in the last 5 years. Education Requirement: Bachelor's degree in engineering or a related technical field. Clearance Requirements: Active Top Secret clearance with Sensitive Compartmentalized Information (SCI) eligibility. U.S. Citizenship is required for this position. #LI- AC1 #LI-Onsite