System Administrator


Leidos is seeking a System Administrator to join our team to support various classified environments onsite in San Diego. The successful candidate will be responsible for maintaining, securing, and supporting complex classified information systems, as well as ensuring compliance with security protocols and regulations.

Primary Responsibilities

This role includes a combination of duties to protect information, and maintain security controls, for an entire system, site, or program to reduce risk.

  • Act as a primary point of contact and support channel for user requests and issues.
  • Ensure compliance with government regulations such NIST Special Publication 800-53.
  • Regularly perform security patching, vulnerability remediation, system hardening, and generation of compliance artifacts.
  • Work independently, and with others, to effectively communicate and document issues, standards, or procedures.
  • Maintain secure virtualized environments of varying operating systems.
  • Other duties as assigned.

Basic Qualifications

  • Must be a U.S. Citizen with an active DoD secret security clearance to be considered. *Must be willing and able to obtain/upgrade to a Top Secret.*
  • DoD 8570 IAT level II or higher certification such as CompTIA Security+.
  • Experience troubleshooting, patching, and maintaining operating systems and third-party environments.
  • Experience with account and group management in an Active Directory environment.
  • Experience with Linux RedHat 8 operating system.
  • Knowledge of change management procedures, roles, and responsibilities.
  • Extensive knowledge of Windows-based domain environments.
  • Experience with the DoD implementation of the Risk Management Framework (RMF) and governing directives (NIST, CNSS, DCSA, etc.).
  • Bachelor’s degree with 2-4 years of experience or relevant industry-standard certifications and experience.

Preferred Qualifications

  • RedHat Certified System Administrator (RHCSA)
  • Understanding of Splunk
  • Experience creating customized scripts using bash or PowerShell to automate tasks.
  • Active DoD Top Secret clearance is highly preferred.

Original Posting Date:


While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $81,250.00 – $146,875.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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