Firewall Engineer

Leidos' Digital Modernization sector is seeking a 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.

Primary Responsibilities

• 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)
  
  

Required Clearance And Certifications

• Must have an active DoD Secret clearance or higher. An active TS/SCI is preferred.
• Must have DoD 8570 IAT II or higher certification (Security CE or equivalent) prior to start.
• Must have a Juniper, Cisco, or Palo Alto certification prior to start.
  
  

Required Qualifications

• BS degree and 8 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 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
  
  

About Our Program

Through the J6 Penetration Handling, Incident, System Health (PHISH) support services task order on the GSM-O contract, we provide IT products, services and solutions to the Pentagon and other DoD offices and agencies for them to meet mission and business requirements. Our Cybersecurity team performs cyber defensive actions in support of J6 to prevent, detect, respond and recover from adversarial activities.

About Leidos

Leidos makes the world safer, healthier, and more efficient through technology, engineering, and science. At Leidos, we offer meaningful and engaging careers, a collaborative culture, and support for your career goals, all while nurturing a healthy work-life balance. We believe in doing whats right and treating people right always. Our corporate values, and the culture they foster, reflect that. At Leidos, culture is not just what we do its how we do it. Our people, our environment and our values make all the difference. We believe diversity and inclusion create the cohesive and collaborative teams that drive innovation. Differences in thought, style, backgrounds, and opinions are valued here.

We recognize that pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers, including competitive salaries, healthcare coverage and wellness programs, immediately vested 401k, income protection, flexible paid leave programs, and professional development and education assistance. For more insight into life at Leidos, visit us at .

Were not looking for perfectly polished resumes or perfect fits. Were looking for people who break limits, ask hard questions, and dont wait to be told whats next. At Leidos, were not following the roadmap were redrawing it.

Original Posting

November 5, 2025

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range

Pay Range $104,650.00 - $189,175.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.