Systems Administrator / Information Systems Security Officer (ISSO)

Leidos' Defense Sector is seeking a Systems Administrator / Information Systems Security Officer (ISSO) to support US Army Central G2 at Shaw Air Force Base, SC. This role is part of the Sentinel G2 Army MI Enterprise, providing IT repair, maintenance, operations, logistics, and engineering services to ensure the secure and uninterrupted availability of Army Military Intelligence Enterprise IT Systems. The ideal candidate must possess a strong customer service focus, a team-oriented attitude, and impeccable ethics. Proven systems and network troubleshooting expertise is essential, as the candidate must be knowledgeable in all assigned technical areas.

This positing is for a potential upcoming opportunity.

Primary Responsibilities:

• Provide Tier I and Tier II support to resolve hardware, software, and application issues across multiple networks, including on-premises and cloud-integrated environments. Provide prompt customer assistance when required.
• Manage user accounts, authentication, and access controls seamlessly across both legacy Active Directory (AD) and Azure Active Directory / Entra ID. Address and resolve tickets related to Azure resource access.
• Guide end-users through the enrollment process for Windows 11 and iOS devices into Microsoft Intune. Troubleshoot and resolve Intune enrollment errors and synchronization issues.
• Review Intune dashboards and on-premises monitoring tools to identify non-compliant devices. Actively assist users in bringing their devices back into compliance.
• Manage and support collaboration and communication tools, including Microsoft 365 (Outlook, SharePoint, Teams, Power Apps), email security, archiving, and PKI encryption.
• Apply mandatory security patches, OS updates, IAVAs, and STIGs across both traditional AD-joined Windows 11 endpoints and Intune-managed devices. Collect, review, and store log files to proactively identify and remediate system issues.
• Perform basic network troubleshooting for workstation/LAN connectivity. Manage scheduling and de-confliction for JWICS Video Teleconferences.
• Document hybrid system configurations using Visio, Word, and PowerPoint. Assist cybersecurity teams with accreditation efforts.
• Fulfill helpdesk support duties as needed, focusing on administrative IT-related responsibilities and providing dedicated customer care across multiple networks.
• Participate in special projects and day‐to‐day operations as needed or assigned by the site lead.

Basic Qualifications:

• Diploma/GED with 6+ years of experience, Associate's Degree with 4+ years of experience, Bachelor's degree with 2+ years of experience, or Master's degree with under 2 years of experience.

• Active DoD TS/SCI clearance required.

• Active IAT Level II baseline certification (CompTIA Security+ CE or equivalent) or higher must be held and maintained in accordance with DoD 8570.01-M and DoD 8140.03 (DCWF) requirements.

• Microsoft Windows 10 MCP certificate of training.

• Understanding of TCP/IP, DNS, DHCP, firewalls, and basic system security practices.

• Basic knowledge of PowerShell, Bash, or Python to automate routine task.

Preferred Qualifications:

• Computing Environment certifications/certificates of training: Microsoft 365 Certified Modern Desktop Administrator, Microsoft Endpoint Administrator, NetApp (ON TAP Data Administrator)
• Experience with Microsoft PowerShell and Power Apps
• DIA VTC scheduling and US Army client and network experience

AMSOPP1

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:

June 8, 2026

For U.S. Positions: 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 $59,150.00 - $106,925.00

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.