Help Desk Systems Administration

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Sigmatech is seeking a dedicated and skilled Help Desk System Administrator to support the National Security Space Institute (NSSI) by ensuring the reliable operation, maintenance, and support of organizational information technology systems. This position serves as the primary point of contact for end-user technical assistance while providing systems administration support for desktop computers, servers, network infrastructure, audiovisual systems, and enterprise applications.

The Help Desk System Administrator will troubleshoot and resolve technical issues, manage user accounts and system configurations, support cybersecurity best practices, and assist with IT projects that enable NSSI's education and training mission. The ideal candidate possesses strong technical troubleshooting skills, exceptional customer service abilities, and a solid foundation in systems administration, network support, and information security within a dynamic training environment.

Job responsibilities for this position include:

Technical Support and Customer Service

• Provide Tier I and Tier II technical support for hardware, software, operating systems, network connectivity, printers, mobile devices, and collaboration tools.
• Diagnose, troubleshoot, and resolve technical issues submitted through service desk tickets, phone calls, email, or in-person requests.
• Escalate complex technical issues to senior administrators, engineers, or external vendors as appropriate.
• Maintain a high level of customer service and ensure timely resolution of user requests.

Systems Administration

• Administer and maintain Windows workstations, servers, Active Directory, Group Policy, file shares, and enterprise applications.
• Create, modify, disable, and manage user accounts, permissions, and access controls.
• Configure and maintain system settings, security baselines, and organizational standards.
• Monitor system performance, availability, and operational health.

Network and Infrastructure Support

• Assist with the administration of network infrastructure, including switches, wireless access points, DNS, DHCP, and TCP/IP services.
• Troubleshoot network connectivity issues and support local and remote users.
• Support audiovisual equipment, conference room technology, and classroom systems as required.

Security and Compliance

• Implement and maintain cybersecurity best practices in accordance with organizational policies and regulatory requirements.
• Apply security patches, operating system updates, and firmware upgrades.
• Assist with vulnerability remediation, system hardening, and compliance activities.
• Maintain proper access controls and ensure protection of organizational data and information systems.

Asset and Configuration Management

• Maintain accurate inventory records of hardware, software licenses, and IT…