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Firewall Engineer at Leidos Washington DC

Job in Washington, District of Columbia, 20022, USA
Listing for: Feitong Buke
Full Time position
Listed on 2026-06-26
Job specializations:
  • IT/Tech
    Cybersecurity, Network Security, Systems Engineer
Job Description & How to Apply Below

Firewall Engineer – Leidos, Washington DC

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, and 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 policies/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.
Pay Range

Pay Range $ - $. The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary.

Benefits

Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement.

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.

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