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System Administrator, Sr​/TS​/SCI​/Onsite: CO Security Clearance

Job in Littleton, Arapahoe County, Colorado, 80120, USA
Listing for: Lockheed Martin
Full Time position
Listed on 2026-06-23
Job specializations:
  • IT/Tech
    Systems Administrator, Cybersecurity, IT Support
Job Description & How to Apply Below
Position: System Administrator, Sr / TS/SCI / Onsite: CO with Security Clearance
Job Number 723437

Description:

Our employees are the core of everything we do, and they are helping the future arrive. As a leading technology innovation company, our team of over 100,000 employees work with our partners around the world to bring the latest technology to our customers' toughest challenges. Headquartered in Bethesda, MD, Lockheed Martin has employees based in all 50 states and more than 570 facilities that span 70 countries.

This Enterprise Operations (EO) position supports the Lockheed Martin Space division located in Denver, CO. The selected candidate will be responsible for providing support to the critical programs under the responsibility of the Space Division. This IT professional will ensure that the Lockheed Martin IT systems are managed, controlled, and compliant with the Corporate Information Protection Manuals (CIPM). This includes upgrades, operations and maintenance, hardware and software installations, and service requests (servers, workstations, containers, networking, and storage), continuity of operations (backups and verified restore capabilities).

In this position, the chosen candidate will utilize their system administration and architecture skills as IT support for several classified environments doing the following:
• Workstation administration on heterogeneous networks including Windows Server based domains, and Linux distributions
• Manage operating system cyber compliance, upgrades, and patching (Windows/Linux)
• Perform guidance and management for hardware, including diagnostics, troubleshooting, and maintenance on multiple architectures
• Ensure the integrity and availability of applications as well as coordinate new application installations, upgrades, and customer support in classified areas.
• Responsible for implementing effective backup/recovery, resource accounting, and auditing procedures.
• Perform troubleshooting and maintenance on varied IT hardware (PCs, printers, laptops, etc.).
• Implements security designs in hardware, software, data, and procedures. This is a Full-time onsite role, working most of the day in closed areas. This role is scoped on a 9X80 Schedule, with every other Friday off! #EBDT

Basic Qualifications:

• Active TS/SCI clearance with ability to obtain CI Poly
• U.S. Citizenship required for access to the work facility
• Must possess Security+ certification or better
• 3+ years of experience administering Linux and Windows server environments
• Demonstrated experience effectively performing in a fast paced, dynamic environment
• Experience with DISA STIGs and Security Hardening of OS and applications
• Experience performing diagnostics and troubleshooting network issues
• Experience with Operating Systems life cycle management and configuration management (i.e., Installation/Upgrades, System Imaging, Account Management, Print Services, integration with Domain Services, Hardware Modernization, Performance Monitoring, etc.)
• Experience determining root causes of network issues and recommending strategies to prevent recurrences
Strong communication skills and ability to work effectively in a team environment
• Ability and willingness to accommodate occasional off-shift hours Desired

Skills:

• Active TS/SCI clearance with a CI Poly
• 5+ years of experience administering Linux and Windows server environments
• Experience with vulnerability remediation and security management (i.e., system hardening, log management, configuration management (i.e., Nessus, Trellix EPO, WSUS, Splunk, ACAS, SCAP, HBSS, etc.))
• Familiarity with automation tools (e.g., Ansible, Power Shell)
• Experience administering Net App storage devices
• Advanced IT certification such as RHCSA, MSCE, or CISSP 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…
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