Senior Systems Administrator (Windows/IIS) Location: Remote Clearance Requirement: Must have an IRS High-Risk Background Investigation, IRS access processing, and required drug screening before CI network access.

About the Role

Nationwide IT Services (NIS) is seeking an experienced Senior Systems Administrator to support secure federal application environments. This role is responsible for maintaining Windows and IIS servers, supporting production systems, coordinating patching activities, monitoring system health, troubleshooting issues, and ensuring system security and reliability. The ideal candidate has strong experience administering Windows-based environments, supporting IIS-hosted applications, and working in highly regulated federal environments. Key ResponsibilitiesAdminister and maintain Windows servers and IIS environments Provide software installations, upgrades, and system maintenance Coordinate and implement security patches and updates Monitor system performance and respond to alerts Troubleshoot production issues and provide operational support Manage user access and account support requests Implement automation and operational improvements Support application availability and performance requirements Collaborate with developers, DBAs, cybersecurity, and infrastructure teams Provide technical guidance, training, and support to project teams Required Qualifications7+ years of Systems Administration experience Strong Windows Server administration experience Hands-on experience with IIS configuration and administration Experience with patch management and system monitoring Strong troubleshooting and production support skills Experience supporting secure, enterprise-level environments Excellent communication and collaboration skills Preferred QualificationsExperience with SCOM or other enterprise monitoring tools Experience supporting federal government environments Familiarity with high-availability systems and SLA-driven operations Experience coordinating with cybersecurity and infrastructure teams Ability to support scheduled maintenance activities outside normal business hours when required Technical Skills Systems & InfrastructureWindows 11 / Windows Server Administration Internet Information Services (IIS) System Center Operations Manager (SCOM) Monitoring and Alerting Tools Access and Account Management Server Operations and Security Maintenance Application TechnologiesC#.NET, ASP.NET, VB.NET .NET Framework Visual Studio JavaScript, AJAX HTML, XML, Open XML Database TechnologiesMicrosoft SQL Server Enterprise SQL Administration and T-SQL Database Backups and Maintenance Crystal Reports Business Objects Cybersecurity & ComplianceFISMA NIST Standards IRS Internal Revenue Manual (IRM) Security Control Assessments (SCA) Enterprise Continuous Monitoring Security Scan Remediation Tools (Guardium, Tripwire, AppScan) Why Join NIS?100% Remote Opportunity Support mission-critical federal programs Collaborative and security-focused environment Opportunity to work with modern enterprise technologies Contribute to reliable, high-impact government systems