Firewall Engineer

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. 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, at minimum, an active DoD Secret security clearance with ability to obtain TS/SCI. 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 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 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. We’re not looking for perfectly polished resumes or perfect fits. We’re looking for people who break limits, ask hard questions, and don’t wait to be told what’s next. At Leidos, we’re not following the roadmap — we’re redrawing it. Original Posting: November 10, 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 $126,100.00 - $227,950.00 The Leidos pay range for this job level is a general guideline only and 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. Leidos Leidos is a Fortune 500® innovation company rapidly addressing the world's most vexing challenges in national security and health. The company's global workforce of 47,000 collaborates to create smarter technology solutions for customers in heavily regulated industries. Headquartered in Reston, Virginia, Leidos reported annual revenue of approximately $15.4 billion for the fiscal year ended December 29, 2023. For more information visit www.Leidos.com. Pay and Benefits 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. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to spam.leidos@leidos.com. Commitment and Diversity All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Salary : $126,100 - $227,950