Network Administrator

General Dynamics Mission Systems, Inc•Scottsdale, AZ

38d•$101,357 - $109,672•Onsite

About The Position

The Network Administrator supports secure, air-gapped network infrastructure across environments serving more than 100 contracts, approximately 50 programs, and 12 distributed sites, with additional sites planned. This hands-on, fully on-site role works closely with the existing Network Administrator and cross-trains across classified and CUI network environments, developing independent operational capability within approximately three to six months. It requires sound technical judgment, disciplined change-control execution, and coordination with Information Assurance, program teams, vendors, carriers, and site personnel. The position is based in Scottsdale, Arizona, and includes occasional on-call support and travel to distributed sites as operational needs require.

Requirements

Bachelor's degree in Information Technology, Computer Science, Engineering, or a related field; or an equivalent combination of education, technical training, certifications, and relevant experience.
At least 5 years of relevant experience with a bachelor's degree or equivalent relevant experience, or at least 3 years with a master's degree.
Current Security+ certification.
Current CCNA certification.
Secret security clearance required at time of hire; U.S. citizenship is required.
Basic hands-on understanding of Cisco switching and routing environments, including VLANs, IP subnetting, routing protocols, and switch port configurations.
Fundamental understanding of the OSI model and structured network troubleshooting methods.
Working knowledge of firewall concepts and network security principles.
Ability to follow established procedures, manage configuration changes carefully, document work accurately, and operate effectively in a controlled classified environment.
Strong communication and collaboration skills, including the ability to coordinate with technical teams, Information Assurance personnel, vendors, carriers, and program stakeholders.
Ability to work 100% on-site in Scottsdale, Arizona.

Nice To Haves

Experience supporting classified, restricted, air-gapped, or Department of Defense network environments.
Experience with Cisco ISE, 802.1X, and Cisco Catalyst Center.
Direct experience with Cisco Firepower Threat Defense (FTD) and/or Palo Alto firewalls.
Experience configuring, operating, or troubleshooting TACLANE encryptors.
Knowledge of DoD Security Technical Implementation Guides (STIGs) and their practical application.
Experience supporting RMF, SSP, ATO, audit, inspection, or other Information Assurance activities.
Experience with network monitoring tools, alert response, incident restoration, and vulnerability remediation.
Experience supporting multi-site networks, circuit coordination, vendor management, and infrastructure deployments.

Responsibilities

Administer, maintain, and troubleshoot classified network infrastructure, including switches, firewalls, TACLANEs, circuits, and related equipment.
Perform switch and firewall configuration changes in accordance with approved change-management and security processes.
Configure, maintain, troubleshoot, and coordinate keying activities for TACLANE devices.
Monitor network health, respond to alerts, investigate incidents, and restore service during outages or degraded conditions.
Support network patching, vulnerability remediation, configuration compliance, and technical-debt reduction efforts.
Assist with classified network deployments, site expansions, program onboarding, and infrastructure refresh activities.
Coordinate with circuit providers, carriers, vendors, site personnel, and internal stakeholders to resolve connectivity and infrastructure issues.
Create and maintain network documentation, asset records, configuration records, diagrams, and operating procedures.
Support audit preparation, evidence collection, inspection activities, and compliance requirements.
Coordinate with the Information Assurance team on System Security Plan (SSP), Authorization to Operate (ATO), and related cybersecurity requirements.
Assist with the transition to the future eWAN architecture and support progress toward the January 2027 ATO target.
Cross-train across classified and CUI network environments to provide resilient backup coverage.
Participate in occasional on-call support and travel to distributed sites as operational needs require.