<p>Provide Tier 2/Tier 3 support for Linux and Windows desktop and server systems. Troubleshoot and resolve hardware, software, OS, and network issues across multiple environments and security domains. Support system patching, configuration management, system monitoring, and log review for both Linux and Windows systems. Assist in user management and access control, including permissions, security groups, and authentication services (e.g., Active Directory, IDM). Respond to helpdesk tickets, track and resolve incidents efficiently, and escalate when appropriate. Assist with routine security checks, vulnerability remediation, and documentation of processes. Provide support for networking issues involving DNS, DHCP, and IP configuration (basic troubleshooting). Collaborate with cross-functional teams to ensure continuity and efficiency in IT operations. Assist in developing helpdesk workflows and processes to provide outstanding user support and efficient cross-team operations. Document troubleshooting steps, system configurations, and standard operating procedures (SOPs). Assist in monitoring and generating reports for maintenance and Cyber RMF continuous monitoring from tools such as Elastic, SolarWinds, Ansible, and BigFix (training provided). 4+ years of relevant IT support experience, including advanced desktop/server troubleshooting. Experience administering Linux (RHEL/CentOS) and Windows Server/Desktop environments. Familiarity with networking fundamentals: TCP/IP, subnets, VLANs, firewalls, DNS/DHCP. Experience supporting secure environments or classified systems (DoD or similar). Active DoD Secret clearance required. Must meet DoD IAT Level II (Security+ or equivalent) certification requirements. Excellent communication skills and ability to explain technical concepts to non-technical users. Proven ability to work independently and within a team, adapting to rapidly shifting priorities. Experience with Red Hat Satellite, Ansible, IDM, or related tools. Familiarity with Active Directory, GPOs, and Microsoft infrastructure services. Exposure to network monitoring and log aggregation tools (e.g., Elastic, SolarWinds). Experience using ticketing systems and following ITIL best practices. Understanding of virtualized environments, particularly Nutanix AHV or VMware. Experience with endpoint management tools such as BigFix. TS/SCI eligibility is a plus. Industry certifications such as RHCSA/RHCE, MCSA, CompTIA Linux+, CCNA, or ITIL v4 are highly desirable.</p>