Senior Firewall Solutions Engineer

Description

Leidos' Digital Modernization sector is searching for an experienced Senior Firewall Solutions Engineer to support our critical GSM-O effort. This is a key position located at the Pentagon, requiring an on-site presence. The ideal candidate will excel in designing, implementing, and managing intricate firewall solutions to uphold the security and integrity of our network infrastructure. Candidates should possess hands-on experience with firewall technologies such as Cisco ASA, Juniper SRX, and Palo Alto, as well as a solid foundation in security networking.

Primary Responsibilities:

• Design, implement, and manage firewall solutions utilizing Cisco ASA/Firepower, Juniper SRX, and Palo Alto technologies.

• Continuously monitor firewall performance and security logs to proactively identify and mitigate potential threats.

• Develop and enforce robust network security policies and procedures.

• Conduct system audits to ensure compliance with industry standards and regulations.

• Collaborate effectively with IT, Security, and Network teams to integrate comprehensive firewall solutions.

• Troubleshoot and promptly resolve firewall-related and network issues while documenting in ticket systems.

• Maintain and update firewall configurations, including security policies and ACLs, as approved by Change Management.

Required Clearance and Certifications:

• Must hold at least an active DoD Secret security clearance with the ability to obtain a TS/SCI clearance; an active TS/SCI is preferred.

• Must possess a DoD 8570 IAT II or higher certification (Security+ CE or equivalent) prior to employment.

• Must have a valid Juniper, Cisco, or Palo Alto certification before starting the role.

Required Qualifications:

• Bachelor's degree with 12+ years of directly relevant experience; additional military or relevant work experience may substitute for a degree.

• At least 3+ years of Firewall experience specifically within the DoD environment.

• Proven expertise in implementing perimeter and internal firewalls, both physical and virtual.

• Extensive experience managing standard baseline configurations across multiple firewalls.

• Demonstrated ability in evaluating security rules for maximized protection while minimizing redundancy.

About Our Program:

Through our J6 Penetration Handling, Incident, System Health (PHISH) support services task order on the GSM-O contract, we provide vital IT products, services, and solutions to the Pentagon and various DoD offices, helping them meet their mission and business objectives. Our dedicated Cybersecurity team engages in cyber defense operations to prevent, detect, respond to, and recover from adversarial activities.

If you seek a dynamic opportunity, your search is over. At Leidos, we challenge the status quo by thinking creatively, building innovative solutions, and keeping pace with the fast-evolving demands of our missions. We are in pursuit of trailblazers who are ready to disrupt the ordinary and refuse to accept failure.

Original Posting:

November 10, 2025

Pay Range:

Pay Range $131,300.00 - $237,350.00

The salary range for this position is a general guideline and doesn’t guarantee compensation or salary. Various factors, including job responsibilities, education, experience, knowledge, skills, as well as internal equity, alignment with market data, and applicable legal agreements, will be considered when extending a job offer.

About Leidos

Leidos is an industry leader, delivering smarter and more efficient digital and mission innovations to government and commercial customers. Headquartered in Reston, Virginia, we employ approximately 47,000 individuals globally, with reported annual revenues of approximately $16.7 billion for the fiscal year ending January 3, 2025.

Pay and Benefits

Compensation and benefits are vital to any career decision. Leidos offers competitive pay packages and comprehensive benefits, including health and wellness programs, income protection, paid leave, and retirement options. Additional details can be found on our career site.

Securing Your Data

Exercise caution regarding potential fraudulent job offers using the Leidos name. Leidos will never request payment-related information during the employment application process and will only communicate through official channels.

To report suspected scams, contact your local law enforcement and the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

We welcome all qualified applicants for employment opportunities irrespective of 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 status, or any other basis prohibited by law. Leidos also considers qualified applicants with criminal histories consistent with relevant laws.