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 possesses a hybrid mindset: combining the tactical, problem-solving skills of a systems administrator with the rigorous, audit-focused discipline of an ISSO. They must be highly organized, capable of troubleshooting complex system failures while maintaining strict compliance with DoD and Federal security baselines.

This positing is for a potential upcoming opportunity.

Primary Responsibilities:

• Deliver end-to-end Tier I through Tier III technical support across multiple networks, resolving complex hardware, software, and application issues, while simultaneously administering Tier II enterprise server data storage environment.
• Support technologies including, but not limited to, collaboration tools (Microsoft Outlook, SharePoint, Teams, Power Apps), email security, archiving, encryption (PKI), integration of Office 365, Voice, Networking, JWICS VTC, and Microsoft operating system deployment in Configuration Manager and Azure/Intune environments.
• Diagnose and resolve problems with desktop and server hardware and operating systems, (NetApp ON TAP, Microsoft Windows 11, Server 2016 R2 or later).
• Maintain required security posture on all systems in accordance with DoD and local command mandates and requirements, including updates, SOPs, STIGs, IOS upgrades, and other basic network security requirements.
• Review and track weekly ACAS scan results; ensure violations are mitigated within acceptable or mandated time.
• Create, track, and update Plans of Action and Milestones (POA&M) items for non-compliant security controls.
• Develop or edit a variety of organizational and system policies and procedures required to show compliance with RMF security controls and System Development Life Cycle (SDLC) sustainment.
• Provide support to the Information System Security Manager (ISSM) for maintaining the appropriate operational Information Assurance (IA) posture for systems, programs, or enclaves.
• Participate in or lead special projects and day‐to‐day operations as needed or assigned by the site lead. Document configurations using Visio, Word, and PowerPoint.

Basic/Required Qualifications:

• Diploma/GED with 8+ years of experience, Associate's degree with 6+ years of experience, Bachelor's degree with 4+ years of experience, or Master's degree with 2+ years of experience
• Active IAT Level II baseline certification (Security+, and/or CASP or higher) must be held and maintained in accordance with DoD 8570.01-M and DoD 8140.03 (DCWF) requirements.
• Microsoft Windows 10 Certificate of Training/Certification.
• 2+ years of hands-on experience developing low-code applications in Power Apps and utilizing scripting to streamline IT workflows.
• Solid understanding of Risk Management Framework (RMF) and its application using NIST 800-53 security controls.
• Strong troubleshooting and communication skills, with a proven ability to collaborate and adapt quickly to emerging technologies.

Preferred Qualifications:

• Experience conducting RMF security control assessments.
• Understanding and hands-on working knowledge of RMF implemented within eMASS.
• Computing Environment certifications/certificates of training: Microsoft 365 Certified Modern Desktop Administrator, NetApp (ON TAP) Data Administrator, Microsoft Endpoint Administrator Associate.
• Experience with Microsoft PowerShell and Power Platform.
• 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 $73,450.00 - $132,775.00

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.