Senior Firewall Administrator (Hybrid)

Overview 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.

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

Certifications (Preferred):

Palo Alto Networks Certified Network Security Engineer (PCNSE)

Cisco CCNP Security (or CCIE Security)

CompTIA Security+, CySA+, or CISSP

Must pass background investigation

Must be a U.S. Citizen

Company Overview Agil3 Technology Solutions LLC ("A3T") is a Northern Virginia based, ISO 9001:2018, ISO 20000 & ISO 27001 Certified, 8a, Women-Owned (WOSB) and Service-disabled Veteran-Owned (SDVOSB) small business. A3T is experiencing industry leading recognition and growth.

Benefits include medical, dental, vision, life insurance, disability coverage, 401k with company match, paid holidays, PTO, tuition and professional development assistance, and parking/travel reimbursement (where applicable).

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