Sr. Systems Engineer- Secret- Onsite Orlando, FLE3

Standard Job Description 
 Lockheed Martin’s EBDT Classified IT Transformation team is modernizing the delivery of classified IT services for Business‑Area partners and DoW programs. We seek an experienced System Engineer to join the Classified IT Center of Excellence (CoE). This is a hands-on position focused on resolving complex technical challenges across applications, systems, and network connectivity within a classified environment. You will be part of a high-performing team responsible for maintaining and defending enterprise IT systems that operate in complex, security-constrained environments. The selected candidate will administer and support Linux and/or Windows systems, network components, and storage platforms. Responsibilities include system installation, configuration, maintenance, and troubleshooting to ensure continuous availability of mission systems. You will ensure the logical and systematic conversion of customer or product requirements into total systems solutions that acknowledge technical, schedule, and cost constraints. Analyses are performed across the full system lifecycle to include: concept, design, fabrication, test, installation, operation, maintenance, and disposal. Working alongside engineers, cybersecurity professionals, and program stakeholders, you will lead system integration, upgrades, and sustainment activities. You will apply systems analysis techniques and procedures, including consulting with users to determine hardware, software, or system functional specifications. You will support cost and risk, supportability, and effectiveness analyses while helping resolve incidents, execute changes, and improve operational processes that directly impact mission success. In this fast‑paced, innovation‑driven environment, the incumbent will: Design, implement, and secure next‑generation IT infrastructure solutions. Standardize and streamline processes across classified environments. Collaborate with cross‑functional teams to accelerate product development for U.S. Department of War missions. Ensure compliance with all relevant security policies and industry best practices. The role is critical to enabling Lockheed Martin to deliver higher‑quality, mission‑critical solutions more rapidly. Job Description | Responsibilities Perform routine updates, major upgrades, patching, and vulnerability scanning Maintain asset inventory and ensure hardware/software lifecycle compliance Enforce Lockheed Martin and DoD policies, including STIG and RMF requirements Implement security hardening, remediate findings, and conduct technical security implementations Provide timely resolution of infrastructure issues (hardware, software, networking) Update Service Central tickets, JIRA issues, and Confluence pages with accurate status, work‑performed details, and any changes to scope, priority, or assignment; attach relevant artifacts and ensure traceability to requirements or incidents. Coordinate with stakeholders (customers, engineers, and support leads) to verify resolution, close tickets or issues promptly, and communicate any follow‑up actions or documentation updates across all three platforms. Design and implement innovative technical solutions to complex problems Support classified customer demonstration environments and lab testbeds, ensuring readiness and performance for stakeholder reviews Document system configurations, procedures, and lessons learned Mentor junior staff and contribute to knowledge‑base growth Participate in a 24 × 7 on‑call rotation; work off‑shift hours and weekends as needed Work onsite full‑time with occasional travel to other Lockheed Martin facilities or customer sites Basic Qualifications 
 3+ years of demonstrated work experience with system administration in one or more areas: Linux, Windows, networking, and/or storage devices Experience performing technical planning, system integration, or systems analysis in an IT environment