Systems Administrator - Senior

Senior Systems Administrator Security Clearance: Secret clearance with IT-I Critical Sensitive / Tier 5 investigation required at proposal submission. Certification Requirements: CompTIA Security+, Microsoft Azure Administrator Associate (AZ-104), and DoD 8140 baseline certification. Position Summary Nationwide IT Services (NIS) is seeking a highly qualified Senior Systems Administrator to support a federal IT application modernization and sustainment program for the Defense Logistics Agency (DLA). The Senior Systems Administrator will be responsible for managing, maintaining, securing, and optimizing enterprise application infrastructure within a Department of Defense (DoD) environment. This position requires extensive experience administering Windows and Linux servers, Microsoft Azure cloud environments, system configurations, and security controls to ensure system availability, reliability, and performance. The successful candidate will provide advanced technical support, perform system maintenance and vulnerability remediation, troubleshoot complex infrastructure issues, and support ongoing modernization initiatives. This position is contingent upon contract award and funding. The work location is off-site. Key Responsibilities Administer, maintain, and optimize Windows Server and Red Hat Enterprise Linux (RHEL) systems within Microsoft Azure environments. Monitor enterprise application infrastructure, including virtual machines, databases, web servers, application server