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. 

Specific duties include but are not limited to the following: 

· 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.

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