The Digital Modernization Sector within Leidos has an opening for a Network Engineer supporting the GIG Service Management – Operations II (GSM-O II) contract at Scott, AFB, IL. This role supports the implementation of new and upgraded network capabilities across IP, Optical, and Transport infrastructure within the Defense Information Systems Network (DISN), and works closely with government engineers, program leadership, project managers, and installation teams to ensure successful transition of capabilities into operational environments.
The selected candidate will serve as a Technical Lead supporting engineering implementation, installation, testing, and acceptance (IT&A), and integration activities across multiple network environments. This role requires both strong technical expertise and the ability to coordinate across engineering, operations, and program management teams.
This position requires U.S. Citizenship and an active Top Secret clearance with SCI eligibility.
Primary Responsibilities:
Provide engineering and technical expertise on all issues relating to the specified telecommunications networks/information systems within the DISN.
Research, analyze and/or develop reports that provide engineering and recommendations across a broad range of specialized network/system functional areas, such as network systems engineering, network topology planning, network route planning, management of network configurations, migration strategies, and method of procedures with an understanding of modeling and simulation of the networks/systems.
Collaborate with DISN government engineers and leadership, project managers, and GSM-O Task Managers for coordination, implementation, and testing of new projects to ensure successful transitions to operations.
Must understand the impact of U.S. defense doctrine on the operations, maintenance, and management of both tactical and strategic systems, and how to effectively interface tactical and strategic telecommunications systems into a seamless entity.
Apply specialized knowledge of military unique features, specifically built into the network and its subtending hardware and software, to ensure appropriate support to the warfighter's requirements.
Evaluate system network requirements and make appropriate technical recommendations.
Provide engineering to establish remote management connectivity, oversee performance verification testing (BER or "burn-in" tests) and configuring alarm and system profiles, and configuring/testing various layers of the OSI model.
Support installation test and acceptance (IT&A) of network components both directly through the various GUI/CLI or interface systems, by directing and/or facilitating remote testing with on-site field engineering support.
Monitor network performance.
Support project deployments as required.
Basic Qualifications:
Bachelor’s degree with 10+ years of related experience, or equivalent combination of education and experience.
Active Top Secret clearance with SCI eligibility required.
Must possess DoD 8570 IAT Level II certification (Security+ CE or equivalent).
Experience supporting telecommunications or transport networks including:
IP networking
MPLS
SONET
TDM
DWDM
Experience supporting network integration, testing, or deployment activities.
Experience remotely configuring or troubleshooting network or transport devices.
Map IP addresses and subnets for networking devices.
Establish in-band/out of band management connections on transport devices.
Ability to interpret network topology diagrams, engineering documentation, and configuration requirements.
Experience supporting Installation Test and Acceptance (IT&A) activities.
The candidate must have excellent written and oral communications skills, strong customer relation and leadership abilities with experience in developing presentations and briefing senior personnel.
Preferred Qualifications:
Proficiency with Juniper IOS, CISCO IOS, or other IP/transport specific management tools (EMS) and general practices.
Expertise in IP technologies, i.e., Networking architectures and methodologies, and Voice Services.
Expert knowledge of IP principles and protocols.
Proficiency in at least two or more of the following devices:
Juniper MX routers
Ciena 6500/5160 Optical Platforms
Cisco 42XX series
Infinera ODXC
Promina, Juniper CTP
Juniper SRX firewalls
Juniper EX switches
SONUS SBCs
KG175
SafeNet IP
SONET encryptors
Basic Linux Administration or command line interface (CLI) and scripting skills.
General knowledge RADIUS, SNMP, NTP, TLS and PKI protocols.
Proficiency in at least one of the following tools:
WWOLS
MSS
OneNet
SMC
SILVX
CTC
Junos Space
SolarWinds
Knowledge of configuring, deploying, and supporting HAIPE (KG-175D) - especially with GD GemOne.
Experience leading a team of technical engineers and communication status to leadership.
Proficient with VISIO drawing software.
Possess an understanding of the physical network infrastructure including fiber optics and copper wiring standards, AC and DC power distribution (rectifiers and inverters), hardware (media converters, modems, repeaters, etc.).
GSMO
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:March 30, 2026For 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.
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.
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We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. 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 newly launched 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. Your most important work is ahead.
