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Sr. Systems Administrator Security Clearance

Job in Reston, Fairfax County, Virginia, 20190, USA
Listing for: Apex Systems
Full Time position
Listed on 2026-06-04
Job specializations:
  • IT/Tech
    Systems Administrator, Cybersecurity, IT Support
Job Description & How to Apply Below
Position: Sr. Systems Administrator with Security Clearance
Sr Systems Administrator

Location:

Reston, Virginia (On-site)

Employment Type:

Contract to Perm

Role Overview
We are seeking a Senior Systems Administrator to support a long-term contract. The successful candidate will be responsible for planning, designing, and implementing infrastructure changes and system upgrades. This role involves providing expert-level support and mentoring for other System Administrator personnel while ensuring the stability and integrity of enterprise-level virtual infrastructures.

Key Responsibilities
Plan, design, and implement infrastructure changes and system upgrades.
Manage and troubleshoot multiple VMware environments.
Provide Windows Server and Linux administration, maintenance, and troubleshooting.
Create STIG compliant images for Windows Desktop, Windows Server, and Linux operating systems.
Create, test, and deploy software packages using deployment products such as SCCM or PDQ.
Provide expert-level support and mentoring for Mid and Junior System Administrator personnel.
Develop and maintain installation and configuration procedures for system and software changes.
Utilize scripting with Power Shell and/or Bash to automate common tasks.
Perform hardware maintenance and repair activities.
Provide advanced administration and troubleshooting of Active Directory, GPO, DNS, and DHCP.

Required Qualifications
Security Clearance:
Must be able to obtain and maintain TS/SCI Security Clearance with a CI Polygraph

Education:

A Bachelor's of Science degree is required.

Experience:

A minimum of 8 years of relevant systems administration experience is required. Technical

Skills:

Ability to write scripts using Power Shell and/or Bash.
Experience managing VMware, Nutanix, or other enterprise-level virtual infrastructures.
Proficiency in managing and troubleshooting Active Directory and Group Policy Objects (GPO).
Must be 8570 compliant (IAT Level
2) by the date of security indoctrination.

Preferred Qualifications
Administration experience with Linux OS (CentOS, RHEL).
Satellite server administration experience.

Experience with Ansible playbook writing.
Knowledge of implementing STIGs.
Experience supporting a software configuration management and development environment.
This employer is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.
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