Network Information Security Specialist

Overview

Description The Defense group at Leidos has a career opening for a Network Information Security Specialist on a DISA contract. This role is primarily on the customer site at Scott AFB, IL. Administrator will provide support for assigned systems supporting Joint Worldwide Intelligence Communications System (JWICS).

• Works independently to perform configuration of Palo Alto enclave firewalls and other Information Assurance Networking assets as needed.
• Perform required patching, STIGs, upgrades, and updates on IA related assets.
• Must manage and enforce security strategies and policies within established guidelines.
• Effectively manage IT Security Strategy, Cyber Security, and Compliance and Risk Management supporting IT Security and Compliance Teams
• Create and maintain system documentation and support accreditation activities.
• Complete accreditation checklists and manage devices to mitigate cyber security controls and measures.
• Assist in the implementation of global projects for Network and Information Assurance upgrades by providing technical insight, projected necessary actions, timelines, and resource availability
• Implement recurring security requirements on network devices
• Communicate with multi-tier support and global partners to coordinate troubleshooting efforts where required.
• Utilize moderate System Administration skills in both Linux and Windows environments to navigate current systems while managing network assets.
• Lead focused multi-tier teams while troubleshooting or upgrading global network problems.
• Provide architectural and topology recommendations where efficiencies can be made.

• Bachelor s degree in a relevant technical discipline with 4+ years of overall related experience, 8+ years of experience will suffice in lieu of degree
• Active DoD Top Secret Security Clearance and ability to obtain a DoD Top Secret with SCI.
• Must have experience or training in IA and IA supporting technologies to include Cisco and Juniper firewalls, authentication technologies (e.g., Active Directory), directory services, and vulnerability assessment tools (e.g., Nessus, nmap).
• At least 3 years Linux or Windows experience.
• Currently possess DoD 8750 certification at IAT level II, e.g. Security+ce or higher.
• Currently possess an active Top Secret security clearance with the ability to acquire a Top Secret/SCI clearance.
• Must satisfy both preparatory and sustaining DoD standard training and certification requirements as a condition of privileged access to any DoD information system.

• Advanced Juniper experience
• Gigamon Load Balancer experience
• Experience with VMware vSphere/ESXi 5.
• ITIL certification.

At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”

If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in.

Original Posting
January 13, 2026

Pay Range
Pay Range $87,100.00 - $

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

Pay And Benefits
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