System Administrator

NSCG is looking for a System Administrator to keep our IT environment secure, reliable, and running smoothly for approximately 300 on-premises and remote users. You will manage identities, devices, networks, and security tools across both our Microsoft GCC High and commercial (corporate) tenants. This is a hands-on role for someone who enjoys solving problems, automating repetitive work, and improving how things get done.

Responsibilities

End User and Device Support

• Provide technical support to approximately 300 users and their devices, both on premises and remote
• Troubleshoot and resolve hardware, software, device, and network issues
• Support and maintain on-premises printers and peripherals
• Manage device enrollment, configuration, compliance policies, and application deployment through Microsoft Intune
• Maintain accurate documentation of systems, configurations, and support procedures Identity and Access Management
• Create, modify, and disable user accounts across the full employee lifecycle (onboarding, role changes, offboarding)
• Administer users, groups, licenses, and permissions in Microsoft Entra ID
• Enforce least privilege, multi-factor authentication, and conditional access policies
• Perform periodic access reviews and remove stale or unnecessary accounts Microsoft 365 and Cloud Administration
• Administer and support both the GCC High and commercial Microsoft 365 tenants
• Maintain clear separation of data and configuration between tenants in line with compliance requirements
• Manage Exchange Online, SharePoint, Teams, and OneDrive settings and policies Network and Infrastructure
• Maintain on-premises network infrastructure, including switches, wireless, and cabling
• Configure, monitor, and manage firewalls, including rules, VPN, and firmware updates
• Monitor network performance and availability, and resolve outages
• Apply patches and updates to servers, network devices, and endpoints Security and Compliance
• Operate and tune intrusion detection and prevention systems (IDS/IPS)
• Monitor security alerts and logs, and respond to and escalate incidents
• Support compliance efforts such as CMMC and NIST SP 800-171, including evidence collection and audit preparation
• Support vulnerability scanning and remediation
• Maintain backup and recovery processes and test restores regularly Automation and Continuous Improvement
• Write and maintain scripts (e.g., Power. Shell) to automate routine administrative tasks
• Identify recurring issues and recommend or implement lasting fixes
• Evaluate new tools and processes that improve security, efficiency, or the user experience Required Qualifications 2+ years of experience in system administration, IT support, or a related role (paid or unpaid) US Citizen CompTIA Security+ or the ability to obtain it within 3 months of hire Desired Qualifications Bachelor’s degree in Cybersecurity, Information Technology, Computer Science, or a related field Certified CMMC Professional (CCP) Additional CompTIA certifications Microsoft security or Azure certifications Identity and access management (IAM) Automation scripting (e.g., Power. Shell, Python, or Bash) Microsoft 365 administration Endpoint management with Microsoft Intune or similar tool Network fundamentals: TCP/IP, NCS, DHCP, VLANs, and VPN Firewall configuration and management Experience supporting a Microsoft GCC High environment Familiarity with CMMC, NIST SP 800-171, or DFARS compliance requirements Azure networking (virtual networks, network security groups, VPN gateways) Creating and managing virtual machines (VMs) in Azure or Hyper-V Azure Virtual Desktop (AVD) management Supporting software development teams, including CI/CD pipelines (e.g., Azure DevOps or GitHub Actions) Experience with SIEM or EDR tools such as Microsoft Sentinel or Microsoft Defender for Endpoint