Sr. Systems Engineer- Secret- Onsite Orlando, FLE

System Engineer

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.

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. Experience troubleshooting and resolving complex technical issues across multiple system domains. Knowledge of system maintenance activities such as patching, updates, and configuration management. Understanding of networking concepts (IP, DNS, routing, etc.). Experience supporting users and translating customer requirements into technical solutions.

Ability to follow and improve established processes for incident, change, and problem management. Experience with DoD requirements and processes including Risk Management Framework requirements within classified environments. Strong communication skills and ability to work effectively in a team environment.

IAT-Level II (8570-compliant) certification (e.g., Security+, GSEC, SCNP, SSCP, CISSP, CISA, GSE, SCNA). 3 + years administering and supporting enterprise-class, classified IT infrastructure. Production-level support for Microsoft Windows and Linux operating systems and enterprise networks. Installation, configuration, deployment, and maintenance of physical and virtual infrastructure (VMware NSX/vSAN/Horizon/ARIA, private/public clouds, SAN/NAS, VDI, Net App, Dell VxRail/HCI). Management of endpoint security with McAfee E-Policy Orchestrator/Trellix Endpoint Security.

Imaging and deployment using Microsoft Deployment Toolkit and Windows OS imaging processes. Use of engineering requirements tools (IBM Rational DOORS, Jama Connect, Polarion). Modeling and simulation with MATLAB/Simulink, SysML/UML, and MBSE tools (IBM Rational Rhapsody, Cameo Systems Modeler, PTC Integrity). Configuration of certificates for web servers (IIS, Apache, Nginx), load balancers, VPN gateways, and client authentication systems;
Windows Server AD Certificate Services installation and hardening. Administration of Linux/Unix PKI solutions (OpenSSL, EJBCA, Dogtag, step-ca). Deep knowledge of Microsoft Active Directory, including AD-Integrated device/user enrollment policies. Network traffic analysis, diagnostics, and troubleshooting expertise. Automation and scripting with Ansible, Power Shell, Bash, Python (or similar). Familiarity with STIGs, RMF, vulnerability management, patching, and security hardening processes. Experience with ITSM/ITOM tools (e.g., Aria Operations) and DoD Cloud Computing SRG compliance.

Excellent written and verbal communication, documentation, and mentoring skills. Growth mindset with willingness to learn new technologies and adapt to a fast-changing, mission-critical environment. Ability…