Senior Cybersecurity Infrastructure Engineer III

Responsibilities

• System Administration in support of local unclassified and classified information system enclaves consisting of information technology devices across four domains (Physical/Virtual Servers, Workstations/Thin clients, Enterprise network infrastructure, etc.).
• Serve as the primary on-site ISSO for the facility; review and recommend changes to system policies, plans, and procedures.
• Maintain, patch, and repair legacy Operating Systems (Solaris), Windows, and Linux servers/workstations in physical, standalone, LAN/WAN, and virtualized/hyperconverged environments.
• Establish and maintain directory services (Windows/Linux) with secure configurations.
• Configure and troubleshoot copper cabling and single-mode/multi-mode fiber connectivity.
• Review and recommend changes to Risk Management Framework (RMF) Security Authorization Package (SAP) documentation.
• Verify system hardening to ensure the most current Security Technical Implementation Guides (STIG)/Security Requirements Guides (SRG) are complete.
• Monitor, record, and transmit comprehensive system logs and trouble reports for accuracy and timely submission.
• Manage routine preventive maintenance, track disk space, and adjust environmental controls in electronic operations areas.
• Obtain Operator Certification within six months to perform duties as an Intelligence Operations Center (IOC) Operator during breaks or personnel shortages (training provided on-site).
• Cookordination with outside agencies and site personnel to facilitate regularly scheduled Radar System Maintenance.
• Maintain, inventory, and manage secure storage containers for COMSEC materials (Secret, Secure Voice, and associated Cryptographic equipment).
• Sanitize and destroy magnetic media, Solid-State Drives (SSD), and optical media using on-site degaussers and shredders in accordance with DoD and DAF standards.
• Perform other duties as assigned by Site Leads.

Qualifications

• Minimum Qualifications (Required): Security Clearance - Must be a U.S. Citizen with a current, active Secret security clearance. Education & Experience Tiers: Bachelor’s degree in a technical discipline (Cybersecurity, IT, Computer Science) + 8 years of relevant experience; OR Associate’s degree in a technical field + 10 years of relevant experience; OR 12+ years of direct, relevant professional experience in lieu of a degree. DoD Certification: Must meet DoD 8140 (formerly 8570) qualification requirements for a System Administrator (DCWF Code 451) at the Intermediate level (e.g., active CompTIA Security+, SSCP, GSEC, or qualifying higher-education degree).
• Systems-Focused Networking: Solid working knowledge and hands-on experience supporting enterprise network environments (LAN/WAN), including basic configuration and troubleshooting of switches, routers, and connectivity. (You do not need to be a dedicated Network Engineer, but you must be comfortable managing network operations alongside system administration).
• OS & Virtualization: Hardening knowledge of Windows, Linux, legacy Solaris, and hypervisors. Experience managing enterprise virtualization environments (VMware vSphere ESXi, Nutanix clusters).
• Experience establishing Windows/Linux directory services and Active Directory in secure configurations.
• Professionalism & Independence: Professional demeanor with a demonstrated ability to act independently, prioritize tasks, and manage schedules in a high-paced, multi-tasked environment.
• Communication: Strong interpersonal skills with the ability to communicate technical information effectively in both oral and written modes.
• Physical Requirements: Ability to lift and carry up to 50 lbs. individually, and team-lift heavier enterprise equipment (such as physical servers and switches) into standard server racks. Mobility & Dexterity: Ability to climb ladders, work in tight spaces (such as cable closets or under flooring), and configure/route physical copper and fiber cabling infrastructure.