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Added 1 min ago
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Must have active DoD TS/SCI security clearance · Must have a Juniper, Cisco, or Palo Alto certification prior to start
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Leidos

Lead Firewall Engineer

Washington, DC, United States

Pay Range $131,300.00 - $237,350.00

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Job details

Pay: Pay Range $131,300.00 - $237,350.00
Posting language: English
Posted: Sep 4, 2026

Original job description

Description

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)
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.

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 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

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.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:

September 3, 2026

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 $131,300.00 - $237,350.00

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.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. 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 at www.leidos.com/careers/pay-benefits .

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com .

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission (https://reportfraud.ftc.gov/#/) .

Commitment to Non-Discrimination

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.

REQNUMBER: R-00191428

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.

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More about this job

Skills

Regulatory compliance
Troubleshoot
ACLS
Change management
Coaching
Security+

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Work requirements

Jobs in the United States