Senior Network and Computer Systems Administrator

American Systems • Arlington, VA

3d • Onsite

About The Position

AMERICAN SYSTEMS is seeking a Senior Network and Computer Systems Administrator to join the NISSC3 Mission at The Pentagon. Step into the iconic halls of America’s command center as part of the NISSC III contract team. Here, your work safeguards national security and enables top-tier operations for the Department of Defense. Support and advance the NISSC III mission, powering critical command, control, and communications that impact global defense. At the very heart of American strategy, be a trusted expert where every contribution matters!

Requirements

• Bachelor’s degree or equivalent DoD/military training
• 7–10 years of experience
• Ability to work with highly sensitive and classified DoD systems and information
• Collect, analyze, and report surveillance and performance metrics
• Prepare meeting agendas, materials, minutes, and monthly task reports
• Maintain documentation for O&M roles, continuity binders, and procedures
• Document issues and propose/support corrective actions and system changes (including Deficiency Reports, Artifact Defects, and AFTO Form 22 recommendations)
• Manage and track System Administration/User Support actions via Incident Reports (IR)
• Conduct standup meetings; interface with local government coordinators for workload prioritization
• Create, manage, and delete user/group accounts and security policies
• Provide one-on-one and remote technical support across multiple sites and systems (including via phone/email/remote logon)
• Proactive monitoring of system and link performance; rapid troubleshooting and restoration
• Perform system backups, restores, startups, shutdowns, error detection, log analysis, and recovery/restoration in line with applicable Technical Manuals and procedures
• Support for remote and telephonic IT assistance
• Support for installation, test events, site prep, validation, and system integration activities
• Execute maintenance per technical documentation, and coordinate with Remedy or site-specific work order systems as applicable
• Perform ISSO (Information System Security Officer) duties per DoDI 8500.01; monitor and remediate system vulnerabilities
• Update antivirus signatures, analyze threats, implement vulnerability management plans, and report security event artifacts
• Ensure timely implementation of IAVMs, CTOs, and threat assessments
• Top Secret (TS) security clearance
• DoD 8570/8140 baseline certification for Information Assurance Technical roles is typically required (e.g., Security+, CISSP, or similar

Nice To Haves

• Ability to operate independently and as part of a cross-functional O&M team
• Experience supporting 24x7 mission operations or on-call technical support in classified environments
• Ability to interface with multiple stakeholders, including military, government civilians, and contractors
• Documentation, communication, and process improvement skills

Responsibilities

• Provides advanced technical leadership and expertise for the NMCC by managing daily onsite 8x5 support and 24/7/365 on-call system administration and user support.
• Oversees and ensures reliable delivery of: Management and reporting System administration Vulnerability management O-Level maintenance Test support tasks in strict adherence to technical manuals and government security protocols.
• Conducts remote troubleshooting and support for Strategic Presidential Decision Support Modules (PDS-Ms) at geographically dispersed locations, ensuring sustained system operability even when the on-site individual is unavailable.
• Analyzes operational trends, incident data, and maintenance activities to drive service improvements.
• Prepares and validates all contractual deliverables—including role continuity binders, performance metrics inputs, incident reports, and technical documentation.
• Establishes, documents, and communicates best practices and lessons learned for all mission assurance activities at NMCC and associated remote support sites.

Benefits

• AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 1,001-5,000 employees