Systems Administrator / Information Systems Security Officer (ISSO)

Description Leidos’ Defense Sector is seeking a Systems Administrator 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. 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 Pay Range $59,150.00 - $106,925.00 Equal Opportunity Employment All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws. #J-18808-Ljbffr