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System Administrator, Sr​/TS​/SCI​/Onsite

Job in Littleton, Arapahoe County, Colorado, 80161, USA
Listing for: Lockheed Martin Corporation
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
Job 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

EEO

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.

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