Sr. Systems Engineer | Florida | Cleared Systems Administrator

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 Enterprise Operations position supports an Enterprise network, delivering secure, mission-critical IT capabilities to collateral Secret programs across the enterprise. As a Systems Engineer-IT Sr Administrator, you will play a direct role in enabling national security objectives by performing technical planning, system integration, and verification and validation of classified infrastructure used by critical programs.

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. You will perform functional analysis, trade studies, requirements allocation, and interface definition studies to translate customer and program requirements into hardware and software specifications.

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.

You will actively contribute to Information Assurance efforts by performing vulnerability scans, remediating security findings, applying patches, and implementing system hardening in compliance with stringent security requirements. Additionally, you will ensure all enterprise assets and software are properly tracked, controlled, and audit-ready.

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. Basic Qualifications: - Tope Secret Security Clearance required with the ability to Obtain and Maintain a CI Polygraph. - 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 Desired Skills: - 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, NetApp, 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, PowerShell, 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 - Active Top Secret (or higher) clearance required at hire; must remain eligible throughout employment , U.S. citizen, candidates must also be eligible to undergo a Counter‑Intelligence (CI) polygraph. - Growth mindset with willingness to learn new technologies and adapt to a fast‑changing, mission‑critical environment Security Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration. Clearance Level: TS/SCI w/Poly Other Important Information You Should Know Expression of Interest: By applying to this job, you are expressing interest in this position and could be considered for other career opportunities where similar skills and requirements have been identified as a match. Should this match be identified you may be contacted for this and future openings. Ability to Work Remotely: Onsite Full-time: The work associated with this position will be performed onsite at a designated Lockheed Martin facility. Work Schedules: Lockheed Martin supports a variety of alternate work schedules that provide additional flexibility to our employees. Schedules range from standard 40 hours over a five day work week while others may be condensed. These condensed schedules provide employees with additional time away from the office and are in addition to our Paid Time off benefits. Schedule for this Position: 4x10 hour day, 3 days off per week Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics. The application window will close in 90 days; applicants are encouraged to apply within 5 - 30 days of the requisition posting date in order to receive optimal consideration. At Lockheed Martin, we use our passion for purposeful innovation to help keep people safe and solve the world's most complex challenges. Our people are some of the greatest minds in the industry and truly make Lockheed Martin a great place to work.

With our employees as our priority, we provide diverse career opportunities designed to propel, develop, and boost agility. Our flexible schedules, competitive pay, and comprehensive benefits enable our employees to live a healthy, fulfilling life at and outside of work. We place an emphasis on empowering our employees by fostering an inclusive environment built upon integrity and corporate responsibility.

If this sounds like a culture you connect with, you’re invited to apply for this role. Or, if you are unsure whether your experience aligns with the requirements of this position, we encourage you to search on Lockheed Martin Jobs, and apply for roles that align with your qualifications. 731670 Experience Level: Experienced Professional Business Unit: ENTERPRISE BUSINESS SERVICES Relocation Available: Possible Career Area: Information Technology Type: Full-Time Shift: First