Network Administrator (Senior)

CACI • Ashburn, VA

5d

About The Position

CACI is seeking a Senior Network Administrator for its Global Mission Operations Support (GMOS) contract, supporting the Department of State. The position supports national security by helping modernize and maintain applications and infrastructure through an integrated IT Service Management approach. The administrator guides and supports a high-performing technical team and maintains secure, resilient enterprise network infrastructure.

The role covers network security and firewall management, Layer 2/3 infrastructure and cabling, load balancers and API Gateways, cloud and software-defined networking, capacity planning, disaster recovery, and service support. It also involves coordinating with Government teams and providers, contributing to facility and network design reviews, and developing troubleshooting guidance for Service Desk Technicians.

The position requires an active Secret clearance and a bachelor's degree plus eight years of related experience, or considered equivalencies. Travel is up to 10% and local. CACI describes flexible time off, learning resources, and comprehensive benefits. The proposed salary range is $103,800–$218,100.

Requirements

• Bachelor’s degree and eight years of experience in a related field, such as network administration, network engineering, infrastructure administration, firewall management, or IT operations; equivalencies considered.
• Active Secret clearance.
• Proven experience with next-generation firewalls, including Palo Alto, F5 BIG-IP, and API Gateway, and advanced network security implementations.
• Demonstrated expertise in Layer 2/3 networking, fiber-optic cabling, network infrastructure design, and disaster recovery configurations.
• Strong knowledge of bandwidth management, capacity planning, and coordination with Government network providers.
• Leadership experience planning and leading technical network initiatives, serving as a subject matter expert, and supervising network operations teams.

Nice To Haves

• Prior experience supporting federal agencies, especially the Department of State.
• Experience with Cisco Umbrella, Illumio, AWS, Azure, or Oracle Cloud networking.
• Professional certifications such as Cisco CCNP, Palo Alto Networks Certified Network Security Engineer (PCNSE), F5 Certified Administrator, or CompTIA Security+.
• Knowledge of ITIL frameworks and change management processes.
• Experience supporting mission-critical network infrastructure in secure environments.

Responsibilities

• Implement and manage web application firewalls and next-generation firewalls, including Palo Alto, F5 BIG-IP ASM, and CA API Gateway.
• Troubleshoot complex firewall issues with DT teams, facilitate secure connectivity with Government agencies, and coordinate with DT’s Firewall Advisory Board.
• Install, configure, troubleshoot, and maintain internal wiring, fiber-optic cabling, and Layer 2/3 network devices across enterprise infrastructure.
• Install and configure load balancers and API Gateway appliances or virtual instances in data centers, cloud, or hybrid environments.
• Track infrastructure component failures and initiate escalations to ensure timely responses within established SLA thresholds.
• Coordinate with DT to plan and execute proactive bandwidth upgrades, using emerging technologies such as AI for network optimization and predictive analysis.
• Restore network connectivity during office moves, relocations, and facility changes, and submit Technical Service Request (TSR) documentation for new jacks and cabling installations.
• Support CA micro-segmentation platforms and policies, as well as cloud and software-defined network infrastructure and policies.
• Participate in design reviews for new facilities and renovation plans, providing technical input on network architecture, cabling infrastructure, and capacity requirements.
• Support disaster recovery network configurations to enable rapid failover, redundancy, and minimal downtime during contingency operations.
• Develop and improve technical or functional workarounds and triage steps to help Service Desk Technicians resolve network issues more quickly.
• Analyze network equipment logs to identify trends, detect problems, and maximize network performance and efficiency.
• Plan and lead technical network initiatives, serve as a subject matter expert, and supervise network operations teams.

Benefits

• Flexible time off benefit.
• Robust learning resources and learning and development opportunities.
• Comprehensive benefits, including healthcare, wellness, financial, retirement, family support, continuing education, and time-off benefits.
• Competitive compensation.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior