Our customer, the Defense Information Systems Agency (DISA), provides, operates, and assures command and control of the Defense Information System Network (DISN) services to its customers, the department of Defense (DoD) and national security organizations. This position directly supports the DISA-provided capabilities and services.
The Leidos Digital Modernization Sector/Global Solutions Management-Operations II (GSMO-II) contract has an opening for a Network Engineer at Scott AFB, IL The Network Engineer will perform sustainment, maintenance, Problem and Change management services to help ensure secure, reliable, and uninterrupted availability of the Department of Defense IP networks.
This position requires U.S. citizenship with ability to obtain Interim Secret clearance. An active Secret clearance is preferred.
Primary Responsibilities: Responsible for assisting with the following duties:
Perform engineering tasks related to the design, implementation, and integration of network changes and sustainment of customer systems in an Wide Area Network environment.
Conduct planning and performance of analytical research, design development, and other manager assigned tasks to align with customer specifications.
Proactively monitor in the control network systems to ensure 99% or better system uptime and connectivity.
Ensure efficient delivery of contract capabilities using industry standards and repeatable processes.
Provide recommendations to mitigate risks, control costs and schedule variance, and effectively manage large scale, integrated projects.
Perform a variety of analytical tasks which include hardware and software design and implementation.
Basic Qualifications:
Currently possess DoD 8750 certification at IAT level II, Security+ CE or equivalent to meet requirement.
Experience analyzing VLAN, routing, IP addressing and sub-netting.
Experience with Palo Alto firewalls, F5 appliances, and Splunk systems
Experience troubleshooting and configuring IP networks using at least one of the following routing methods: BGP, ISIS or OSPF, Static routing.
Experience with either service provider or enterprise IP networks using an interface on Cisco (ESR and ASR) and/or Juniper routers.
Experience with ports and protocols.
Ability to obtain a DoD Secret security clearance.
Preferred Qualifications:
Proficient in either Juniper or Cisco configuration, troubleshooting, and design.
Experience with Cisco IOS XR, JUNOS, and Cisco IOS codes.
Pearl or other language scripting capable of running backup confits and other scripting to pull information from Cisco/Juniper routers
IPSEC configuration, troubleshooting, and design experience.
MPLS configuration, troubleshooting, and design experience.
IPV6 configuration, troubleshooting, and design experience.
Security certification and/or knowledge of DDoS and other attack vectors experienced in today' networks.
Crypto configuration, troubleshooting, and design experience.
Layer 2/3 VPN and Firewall knowledge and experience.
Physical cable plant and wiring experience.
Certifications with major network system vendors such as Cisco are a strong plus.
Excellent project, technical, interpersonal, presentation and problem management skills.
Network integration experience for a variety of network protocol standards.
Ability to communicate orally, and in writing, detailed technical information on troubleshooting and implementation efforts.
Familiarization of DOD regulations and directives.
Currently possess an active DoD Secret security clearance.
Required Education and Experience:
Requires BS degree or equivalent experience and less than 2 years prior relevant experience.
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.
May 15, 2026
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 $50,700.00 - $91,650.00
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.
Leidos is a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health. The company's global workforce of 48,000 collaborates to create smarter technology solutions for customers in heavily regulated industries. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $15.4 billion for the fiscal year ended December 29, 2023.
Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.
Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.
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