CyberSecurity/SysAdmin

Job Title: Classified Systems Administrator and ISSOJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/SCI with PolygraphEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Continental US* * *The OpportunityCACI is seeking a Classified Systems Administrator| ISSO to support and maintain mission-critical classified information systems in a secure environment. This role combines systems engineering, systems administration, cybersecurity, virtualization, and Information Assurance (IA) responsibilities to ensure the reliability, security, and compliance of classified networks. The ideal candidate will manage Windows Server infrastructure, virtualization platforms, enterprise applications, storage solutions, and security technologies while supporting DCSA/NISPOM compliance requirements. This position also provides technical leadership, mentors junior team members, and supports continuous system modernization in a high-security environment. An active Top Secret security clearance with the ability to obtain a CI Polygraph is required.ResponsibilitiesInstall, configure, administer, and maintain Microsoft Windows Server operating systems across classified environments.Manage virtualization platforms including VMware, Hyper-V, and Nutanix, ensuring availability, performance, and security.Administer enterprise services and applications including Microsoft Exchange, Microsoft SQL Server, Skype for Business, Jira, and Confluence.Troubleshoot, analyze, and resolve hardware, software, networking, and infrastructure issues across multiple classified networks.Monitor system performance, apply operating system patches, and implement security mitigations using vulnerability scanning tools such as Nessus.Manage enterprise storage platforms including Pure Storage, Dell PowerVault, and Synology appliances.Process classified user account requests, access modifications, and Active Directory administration in accordance with DoD and NISPOM requirements.Serve as the onsite Data Transfer Agent (DTA), performing, documenting, and auditing authorized classified data transfers while maintaining removable media accountability.Maintain accurate inventory and accountability of classified IT assets, removable media, and peripheral equipment in accordance with DCSA requirements.Prepare and submit Security Impact Analysis (SIA) packages for hardware, software, and configuration changes, coordinating approvals prior to implementation.Provide Tier III technical support, mentor junior technicians, communicate escalation status to leadership, and participate in after-hours maintenance and outage support.Active Top Secret (TS) security clearance with the ability to obtain a Counterintelligence (CI) Polygraph.Extensive experience administering Microsoft Windows Server environments, including installation, configuration, patch management, and performance optimization.Hands-on experience managing VMware, Hyper-V, and Nutanix virtualization environments.Strong knowledge of Microsoft Active Directory, DNS, DHCP, and Group Policy administration.Demonstrated commitment to continuous learning and supporting mission-critical classified environments.DesiredExperience administering Microsoft SQL Server.Experience supporting Skype for Business and Microsoft MECM/SCCM environments.Experience supporting classified Information Assurance processes, Security Impact Analyses (SIAs), DCSA compliance, and secure data transfer operations.-As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose - to ensure the safety of our nation.CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.