Senior Firewall Administrator (Hybrid)

The Senior Firewall Administrator is responsible for the design, configuration, administration, monitoring, and troubleshooting of the agency’s enterprise firewall and network security infrastructure.

This role ensures that the network perimeter, internal segmentation, and remote access solutions are properly secured, compliant with federal standards, and optimized for availability and performance.

The Senior Firewall Administrator provides Tier III support for escalated security incidents, collaborates with the Senior Network Administrator, and guides less senior administrators.

Key Responsibilities Firewall Administration Configure, manage, and maintain enterprise-class firewalls (e.g., Cisco ASA / Firepower, Palo Alto, Fortinet) across data centers, headquarters, and regional offices.

Manage firewall rules, NAT, VPN tunnels, and access control lists (ACLs) to ensure secure connectivity.

Perform routine patching, firmware upgrades, and policy updates.

Network Security Operations Monitor firewall logs, intrusion prevention / detection alerts, and traffic flows to identify and remediate threats.

Ensure compliance with agency security baselines, federal directives (FISMA, NIST, OMB), and industry best practices.

Implement and maintain segmentation, Zero Trust principles, and conditional access policies.

Incident Response & Troubleshooting Provide Tier III support for escalated firewall and network security incidents.

Collaborate with SOC, cybersecurity teams, and external vendors during incident investigations.

Conduct forensic analysis and root-cause investigations when required.

Documentation & Knowledge Management Maintain current firewall configurations, network security diagrams, and system baselines.

Develop and update SOPs for firewall operations, change management, and incident handling.

Mentor and provide guidance to junior administrators and Tier II staff.

Strategic Input & Projects Support cloud security integration (Azure, M365, Intune, hybrid networking).

Provide input into network and security architecture planning.

Participate in disaster recovery exercises, failover testing, and compliance audits.

Minimum Qualifications

• Education :
• Bachelor’s degree in Computer Science, Information Systems, Cybersecurity, or related field.
• Experience : Minimum of 7–10 years of network and firewall administration experience , with 5+ years in a senior or lead firewall / security role.
• Technical Expertise : Advanced knowledge of firewall platforms (Cisco ASA / Firepower, Palo Alto NGFW).
• Strong background in VPNs, IPS / IDS, remote access, and rule-base optimization.

Familiarity with SIEM tools, packet capture / analysis, and network forensics.

Citizen.   Company Overview Agil3 Technology Solutions LLC ("A3T") is a Northern Virginia based, ISO 9001 :

A3T offers excellent benefits to enhance the work-life balance, including :