Sr. Systems Engineer | Florida | Cleared Systems Administrator

Reference: 731655BRPosted: 2026-07-27Location: Orlando, FloridaClearance: TS/SCI w/PolyCompany: Lockheed MartinDescription: Priority consideration will be given to qualified candidates who are currently affiliated with the Enterprise Operations’ Enterprise Business & Digital Transformation (EBDT) organization. #EBDTLockheed 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). 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.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 sitesBasic Qualifications:- Active Top Secret Clearance with the ability to to obtain and maintain a CI Polygraph. - Demonstrated experience with configuring and maintaining Microsoft Windows & Linux Client/Server operating systems.- Experience with Active Directory administration and Group Policy Object configuration.- IAT‑Level II (8570‑compliant) certification (Security+ or equivalent certification)- Proven classified infrastructure support and administration experience- Experience with DoD requirements and processes including Risk Management Framework requirements within classified environments.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 environmentSecurity Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.Clearance Level: TS/SCI w/PolyOther Important Information You Should KnowExpression 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 weekLockheed 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.Experience Level: Experienced ProfessionalBusiness Unit: ENTERPRISE BUSINESS SERVICESRelocation Available: PossibleCareer Area: Information TechnologyType: Full-TimeShift: First