<p>Experience with Everfox cross-domain solutions (CDS), Commercial Solutions for Classified (CSfC), TTC/TTCR, High Speed Guards, and Trusted Gateway Systems is highly desirable. 5+ years of hands-on experience supporting both Linux and Windows systems in an enterprise or DoD setting. Working knowledge of basic virtualization technologies (e.g., VMware or Nutanix). Familiarity with networking concepts: IP addressing, DNS, DHCP, VLANs, and firewalls. Active DoD Secret clearance (TS/SCI eligibility is preferred). Must meet DoD IAT Level II certification requirements (Security+ CE or equivalent). Strong troubleshooting skills and ability to support users in a professional, structured environment. Ability to follow detailed technical procedures and document changes accurately. Excellent teamwork, communication, and time-management skills. Experience with Red Hat systems, particularly RHEL 7/8, Satellite, and IDM. Exposure to enterprise tools like BigFix, Ansible, SolarWinds, Elastic Stack, or Veeam. Some experience with scripting (PowerShell, Bash) or configuration automation. Previous work in classified environments and knowledge of RMF, STIGs, and cybersecurity policies. Exposure or experience with deployment and maintenance of enterprise data catalogs such as Informatica, Alation, Apache Atlas or others. Experience in supporting enterprise user onboarding, desktop imaging, and remote support. Familiarity with Dell PowerScale (Isilon) or similar enterprise storage systems is a plus. IT certifications such as RHCSA, MCSA, Linux+, CCNA, or Nutanix/VMware foundational certs are beneficial. Bachelor's degree in IT, Cybersecurity, or related discipline. Support day-to-day operations of Linux (RHEL/CentOS) and Windows Server/Desktop systems. Assist with troubleshooting OS, application, and connectivity issues across multiple systems and networks. Perform routine system administration tasks including patching, updates, account management, and basic scripting. Support virtualization environments (Nutanix AHV or VMware ESXi) under the guidance of senior staff. Help maintain system and network monitoring tools (e.g., Elastic, SolarWinds), logging systems, and backup solutions (e.g., Veeam). Assist with endpoint management and configuration using automation tools like Ansible, Satellite, and BigFix. Collaborate with the helpdesk and users to resolve tickets and escalate issues as needed. Document standard operating procedures, configuration changes, and system logs. Participate in configuration, deployment, and maintenance of infrastructure in secure environments. Support system hardening efforts and compliance activities in accordance with RMF, STIGs, and other DoD cybersecurity standards. Work with the Senior Systems Administrator to onboard new users and research teams to centralized infrastructure and services. Contribute to system upgrades, security audits, and overall IT support operations.</p>