Information Systems Security Engineer

Leidos is seeking an experienced Firewall Engineering Architect to provide senior-level technical leadership, architectural oversight, and strategic direction for NASA's enterprise security and network modernization initiatives. This role is central to designing, evolving, and optimizing the firewall, security, and perimeter protection services that safeguard NASA's Local Area Network (LAN), Wide Area Network (WAN), Mission Network, and cloud-connected environments.

The selected candidate will serve as the lead architect for NASA's Firewall Engineering domain, guiding a highly skilled team responsible for advanced security design, migration planning, policy development, and the integration of next-generation firewall technologies across NASA's enterprise. This position requires deep technical expertise in firewall and network security engineering, strong leadership capabilities, and the ability to collaborate effectively with NASA senior leadership, program management, cybersecurity leads, and cross-functional engineering teams., * Lead the Firewall Engineering Architecture Team, providing technical direction for enterprise firewall, IDS/IPS, and security control design and integration.

• Define NASA's enterprise firewall architecture strategy, ensuring alignment with zero-trust, mission-security, and risk management requirements.
• Serve as the senior technical authority and escalation point for complex firewall, perimeter security, and cross-domain protection issues.
• Develop modernization roadmaps and standards for firewall performance, resiliency, rule/policy lifecycle management, and automation.
• Oversee large-scale firewall migrations, data center and cloud integrations, and enterprise segmentation initiatives.
• Partner with NASA and Leidos leadership to support proposals, technical volumes, and Basis of Estimates (BOEs) related to security architecture efforts.
• Drive innovation in areas such as firewall automation, orchestration, SDN-based security, cloud-native firewalls, and threat visibility enhancements.
• Establish governance processes for rule validation, configuration baselines, policy stewardship, and continuous monitoring.
• Mentor engineers, establish training pipelines, and promote technical rigor and standardization across the Firewall Engineering discipline.
• Deliver data-driven technical briefings and executive-level recommendations to NASA and Leidos senior management., #Featuredjob Related Jobs Information Systems Security Engineer (Part-time)) Leidos Columbia, MDOn-Site Auditing Equities Operations Purchasing Upskilling Market Data NIST 800-53 Cryptography Self-Starter Key Management Microsoft Excel Ancient History Defense In Depth Microsoft Outlook Rapid Prototyping Analytical Method Systems Engineering GIAC Certifications Enterprise Security Technology Research Time Off Management Security Engineering Software Development CompTIA Security+ CE Signals Intelligence Information Assurance Prototype Development Risk Management Framework Computer Network Operations Information Systems Security GIAC Security Leadership Certification Systems Security Certified Practitioner Top Secret-Sensitive Compartmented Information (TS/SCI Clearance) +0 SME Cybersecurity Systems Engineer Leidos Gaithersburg, MDOn-Site Auditing Equities Analytics Scalability Market Data Data Storage Promulgation Data Analysis Cyber Defense Cyber Security Team Leadership Ancient History Computer Science Machine Learning Product Planning Security Controls Technical Standard Security Strategies Systems Engineering Information Systems User Interface (UI) GIAC Certifications User Experience (UX) Systems Architecture Information Assurance Continuous Monitoring Cyber Security Systems Artificial Intelligence Security Implementation IT Security Architecture Site Reliability Engineering Continuous Improvement Process Milestones (Project Management) Model Based Systems Engineering GIAC Certified Intrusion Analyst GIAC Certified Forensics Analyst Artificial Intelligence Infrastructure Application Programming Interface (API) Counter Intelligence Polygraph (CI Clearance) CompTIA Advanced Security Practitioner (CASP+) Security Information And Event Management (SIEM) Certified Information Systems Security Professional Top Secret-Sensitive Compartmented Information (TS/SCI Clearance) +0

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• 8-12+ years of experience in enterprise network security or firewall engineering, with 8-10+ years serving in senior engineering, architectural, or leadership roles.
• Proven experience designing and managing large-scale, mission-critical firewall and perimeter security infrastructures.
• Deep expertise with next-generation firewall platforms (e.g., Palo Alto, Fortinet, Cisco, Juniper) and enterprise-grade security services.
• Strong understanding of network architecture, routing/switching, zero-trust principles, intrusion detection/prevention, and segmentation strategies.
• Demonstrated ability to lead multidisciplinary engineering teams in complex, high-visibility operational environments.
• Experience supporting large IT infrastructure programs, including proposal development and BOE creation.
• Excellent communication, leadership, and stakeholder engagement skills.
• U.S. Citizenship required; must be eligible for NASA or Federal security clearance., * Experience supporting government, aerospace, or NASA environments.
• Industry certifications such as CISSP, CCNP Security, JNCIS/JNCIP Security, PCNSE, or equivalent.
• Familiarity with cloud security architecture, cloud-native firewalls, and SDN-based security models.
• Experience leading geographically distributed engineering or security teams., GIAC Cyber Threat Intelligence GIAC Certified Intrusion Analyst GIAC Certified Forensics Analyst GIAC Certified Forensic Examiner Troubleshooting (Problem Solving) Certified Information System Auditor (CISA) Security Information And Event Management (SIEM) +0

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 .

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., 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 .