Senior System Administrator

Job ID: 2512324

Location: ARLINGTON, VA, US

Date Posted: 2025-12-11

Category: Information Technology

Subcategory: Sys Administrator

Schedule: Full-time

Shift: Day Job

Travel: No

Minimum Clearance Required: Top Secret

Clearance Level Must Be Able to Obtain: TS/SCI

Potential for Remote Work: No

Description

SAIC is seeking a motivated and experienced System Administrator to join our team at the Pentagon in Arlington, VA. This position is 100% onsite.

Shift Schedule: Monday-Friday, 6:00 AM to 6:00 PM core hours with occasional after-hours onsite work to support a NIPR and SIPR environment.

Position Overview:

• Manage currently supported and subsequent Windows Server Operating Systems on virtual operating environments, providing technical oversight and consultation services.
• Perform complex system administration and security engineering efforts, STIG remediation, advanced GPO implementation and system upgrades.
• Research and resolve performance, capacity, and other server-related issues.
• Provide mentorship and guidance to junior systems administrators and other IT staff.
• Improve efficiencies by documenting and standardizing support processes while capturing and developing best practices.
• Provide support for the escalation and communication of statuses to leadership to include the government customer.
• Maintain and update Server STIG (Security Technical Implementation Guide) requirements to comply with DISA standards.
• Ability to remain flexible and adapt to changing priorities with efficiency.
• Adhere to change management guidelines by writing Change Requests and seeking the necessary approvals.
• Support operational transition of enterprise solutions into production.

Qualifications

Required Education and Experience:

• Bachelors degree and five (5) years or more of experience or Masters and three (3) or more years of related experience.

Required Clearance and Certificates:

• Active DOD Top Secret clearance; ability to obtain a TS/SCI.
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• Active DoD 8570.01-M/8140 IAT Level II certification (e.g., Security+ CE, CySA+, etc.)
• Relevant Computing Environment Certificate.

Required Technical Skills:

• Expert-level knowledge of Microsoft Windows Server, Active Directory Domain Services (AD DS), Domain Name System (DNS), and Group Policy (GP) management.
• Experience implementing and managing Active Directory Certificate Services (AD CS) to support a large-scale Public Key Infrastructure (PKI).
• Strong understanding of authentication mechanisms (Kerberos, LDAP, NTLM) and experience with advanced troubleshooting.
• Experience implementing Public Key Infrastructure (PKI) with Active Directory.
• Knowledge of Security Assertion Markup Language (SAML).
• Excellent analytical skills and a proven track record in developing and implementing innovative solutions to complex problems.
• Experience working in a multi-tenant or large enterprise server environment.
• Skilled in scripting and automation using PowerShell to improve and standardize system management.

Desired Qualifications:

• Active DoD 8140 IAT Level III certification.