Senior Systems Administrator

Description The Senior Systems Administrator supports the U.S. Army Information Systems Engineering Command (USAISEC), Communications Security Directorate (CSD), by providing comprehensive enterprise-level system, network, and workstation administration services across classified and unclassified environments. This role ensures the availability, security, continuity, and performance of all CSD‑managed IT systems, user endpoints, network infrastructure, and supporting technologies. This role is 100% onsite. Responsibilities Administer, update, and maintain physical and virtual Windows, Linux, UNIX, and Active Directory servers. Install, configure, and sustain system and application software, patches, and updates. Monitor system performance and resolve operational issues. Manage support tickets with vendors and Government partners and coordinate warranty actions. Provide daily end‑user technical support for workstations, peripherals, and communication devices. Deploy and maintain workstations and associated hardware. Create and manage user accounts across classified and unclassified networks. Troubleshoot hardware, software, and connectivity issues. Deliver user training on core operating systems and software tools. Issue outage notifications for planned and unplanned service events. Serve as Key Management Infrastructure (KMI) Client Platform Administrator. Configure and maintain LAN/WAN devices including routers, switches, encryptors, and firewalls. Monitor network uptime, traffic, and performance. Install, test, and maintain copper and fiber cabling, resolving physical and logical network issues. Document cabling, port assignments, and network configurations. Enforce cybersecurity policies in alignment with Army, DoD, and RMF requirements. Manage domains, permissions, privileged accounts, and access controls. Support RMF and ATO processes through system documentation and compliance artifacts. Run vulnerability scans, validate security controls, and support continuous monitoring. Respond to security incidents, malware events, and classified spillage. Isolate affected systems, preserve evidence, and support remediation activities. Execute and verify daily system backups. Transport classified backup media to off‑site secure facilities as required. Maintain and test contingency and disaster recovery plans. Prepare for outages, hardware failures, and service disruptions. Support long‑term IT planning and lifecycle replacement strategies. Evaluate and recommend emerging technologies. Participate in technical boards, working groups, and governance activities. Prepare and deliver technical briefings and analysis. Support system testing, including scenario‑based and configuration‑based evaluations. Maintain system documentation, SOPs, and troubleshooting guides. Ensure documentation supports rapid onboarding of new personnel. Improve tools, processes, and procedures as directed by leadership. Why Work For ISS? At ISS we pride ourselves on providing an employee‑focused and family first environment. Being a small business, we take the time to get to know our employees and have a vested interest in helping them achieve their career goals. We work to schedule regular social gatherings within the company to foster camaraderie. ISS values their employees by providing a comprehensive benefits package that includes a fully vested 401(k) matching program, coverage of family medical deductibles, spot bonuses, and educational assistance to further your career. Requirements Clearance Level Top‑Secret Clearance Certifications Must meet DoD 8140 Cyber Workforce Qualification Program requirements for System Administrator (DCWF 451), Intermediate level. One of the following: CompTIA Cloud+ CompTIA Security+ GIAC Global Industrial Cyber Security Professional (GICSP) GIAC Security Essentials Certification (GSEC) Systems Security Certified Practitioner (SSCP) Required Skills Minimum 10 years of experience At least 2 Certifications within the following disciplines: Systems and network administration, Operating systems, Server Virtualization, Videoconferencing, Fiber optic cabling, Audio/visual systems, Network and systems management and control, Media access/digital interfaces, Voice over Internet Protocol (VoIP), and/or System and/or network protocols #J-18808-Ljbffr