Security Infrastructure Engineer

R-00170492

Description

As a Security Engineer on our team, you will operate and maintain network security infrastructure utilized by a team of cybersecurity analysts in support of 24x7x365 mission-critical operations. This position allows hybrid telework about 40% of the time. The other 60% must be on-site.

Primary Responsibilities:

• Work with government counterparts, contractors, and internal team members to deploy and manage policies, rules, and signature sets on cybersecurity capabilities
• Manage high-priority tasks and outages
• Maintain, develop, and improve Security Infrastructure standard operating procedures and tactics, techniques, and procedures (TTPs)
• Maintain complete and current network and elevation diagrams for all managed security equipment
• Coordinate and comply with applicable change control boards and corresponding processes
• Advise and strategize with government and program leadership on ways to improve the security infrastructure, requiring multi-dimensional problem solving and ingenuity with impact on multiple aspects of the mission
• Provide briefings to program/project leadership, government leadership, and other internal stakeholders on security infrastructure status, updates/patches, issues, and/or upgrades
• Operate and maintain cybersecurity capabilities to include IDS/IPS/Netflow/SIEM/Snort/Linux/Virtualization etc
• Ensure Compliance standards 

Required Clearance and Certifications:

• Must have an active DoD TS/SCI clearance
• Must have DoD 8570 IAT II or higher certification (Security+ CE or equivalent) prior to start
• Must obtain a DOD-8570 CSSP Infrastructure Support certification within 6 months of start 

Required Qualifications:

• Bachelor's degree and 8+ years of professional experience; additional military service and/or relevant work experience may be considered lieu of a degree
• 2+ years of technical experience deploying and maintaining cybersecurity tools, especially IDS/IPS capabilities
• Demonstrated experience with configuring, maintaining, and troubleshooting cybersecurity infrastructure and capabilities.
• Demonstrated knowledge of network traffic and communications, including known ports and services.
• Hands-on experience with the Windows and Linux operating system and their respective command line interfaces and scripting shells   

Preferred Qualifications:

• Experience with automation and orchestration frameworks (ex. Ansible, Puppet, Chef)
• Deep technical understanding of core current cybersecurity technologies as well as emerging capabilities
• Demonstrated understanding of the life cycle of cybersecurity threats (internal and external), attacks, attack vectors and methods of exploitation with an understanding of intrusion set TTPs
• Motivated self-starter with strong written and verbal communication skills, and the ability to create complex technical reports on analytic findings
• Familiarity or experience in Intelligence Driven Defense, Cyber Kill Chain methodology, and/or MITRE ATT&CK framework
• Prior hands-on experience as a SOC analyst

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: November 14, 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 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.

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 .

Commitment to Non-Descrimination

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.