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# Lead Firewall Engineer

- **Company:** Leidos, Inc.
- **Location:** Arlington, VA, United States
- **Experience:** Expert
- **Salary:** $131,300 - $237,350
- **Contract:** Permanent contract
- **Skills:** Cisco PIX, Global System for Mobile Communications, Information Technology Audit, Network Security, Network Architecture, Network Administration, Firewalls (Computer Science), Juniper, Information Technology, Firepower, Firewall Services Module, Cyber Warfare, Cisco
- **Published:** November 5, 2026
- **Apply:** https://www.careerbuilder.com/job-details/lead-firewall-engineer-washington-dc--1c7cb1e8-b82f-410f-b4e0-352f2294355d

## About the Role

Firewalls, Cisco ASA (Adaptive Security Appliance), Network Administration/Management, Juniper Networks Product Family, Firewalls, GSM (Global System for Mobile Communications), Network Security, Performance Analysis, Information Technology/Systems Audit, Maintain Compliance, Leidos' Digital Modernization sector is seeking a Senior Firewall Engineer to support the GSM-O effort. This position is located at the Pentagon and is 100% on-site. This role requires an engineer who can design, implement, and manage complex firewall solutions to ensure the security and integrity of network infrastructure. The ideal candidate has experience with firewall technologies including Cisco ASA, Juniper SRX, and Palo Alto, as well as a strong background in security networking., * BS degree and 12+ years of directly relevant experience. Additional military or relevant work experience may be considered lieu of a degree.

 * 3+ years of Firewall experience within the DoD environment
 * Demonstrated knowledge in planning, directing, and managing a Firewall Team in an organization similar in size to this acquisition
 * Demonstrated knowledge of Implementation of Perimeter and Internal Firewalls (both physical and virtual contexts)
 * Demonstrated advanced experience in managing standard baseline configuration across numerous firewalls
 * Demonstrated advanced experience in evaluating rules to ensure maximum security while minimizing redundancy in rules
 * Demonstrated experience with researching and fielding new and innovative firewall technology

## Description

* Design, Implement Manage firewall solutions using Cisco ASA/Firepower, Juniper SRX and Palo Alto.
 * Monitor firewall performance and security logs to identify and mitigate potential threats.
 * Develop and enforce network security policies and procedures.
 * Perform system audits to ensure compliance with standards and regulations.
 * Collaborate with other IT, Security and Network teams to integrate firewall solutions.
 * Troubleshoot and resolve network and firewall related issues promptly and document within ticket systems.
 * Maintain and update firewall configurations (security polices/firewall ACLs as approved by Change Management)
 * Serve as a People Leader for personnel supporting the Firewall Task Area:
 * Serve as the focal point for all firewall tasks, operations, projects, and assessments.
 * Ensure all tasks are delivered according to timelines
 * Provide written reports and oral briefings to the Government Task Lead and PMO Team
 * Conduct annual performance assessments to include periodic check ins.
 * Validate/approve time charging for both Leidos and vendor personnel.
 * Provide coaching/mentoring to personnel.
 * Develop and Execute Continual Service Improvement technical strategies to modify and enhance operational processes and impact strategic project/program goals and business results.

Required Clearance and Certifications:

 * Must have active DoD TS/SCI security clearance
 * Must meet requirements for DoD 8140 - Cyber Defense Infrastructure Specialist Intermediate prior to start (acceptable certifications include CEH, CySA+, Security+. etc)
 * Must have a Juniper, Cisco, or Palo Alto certification prior to start.