Leidos' Digital Modernization group is seeking a Network Administrator in support of the Compartmented Enterprise Services Office (CESO) in Arlington, VA. This position is 100% on-site with occasional/situational travel.
This is a day shift position Monday to Friday with hours of 0600 - 1400.
With the CESO program, the Defense Information System Agency (DISA) is looking to transform the existing Secure Web Services (SWS) environment, which provides secure information sharing to the community, into a more mature service offering to meet the DoD and intelligence communities. As part of this task order, Leidos will manage the commercial cloud migration and disestablishment of legacy systems, fully automate the continuous development & continuous integration environment, fourth estate consolidation, professionalize services – ITIL/DevSecOps based processes, improve the customer experience 1st call resolution, and achieve development of a service catalog for Defense Working Capital Fund (DWCF) Model.
U.S. citizenship with an active TS/SCI clearance and ability to obtain a CI Poly is required.
Primary Responsibilities:
Network monitoring of connections and performance to ensure network availability for user access and services.
Proactively identify risks and issues in the network and complete actions to mitigate them.
Able to plan, coordinate and implement network maintenance, installation, and security to protect and improve network infrastructure.
Receive and review user requests to establish or resolve issues with user access to services.
Troubleshoot and resolve network issues and escalate complex problems to senior engineers or vendors.
Configure, install, and maintain network devices and software
Basic Qualifications:
Currently possess an active TS/SCI security clearance
Currently possess DoD 8570 certification at least IAT level II, e.g Security+ce.
BS in computer science or IT and 4+ years of experience. Additional experience may be considered in lieu of degree.
Experience monitoring network performance, security, and availability
Experience in configuring switches and routers.
Experience working with Dynamic routing protocols (BGP, OSPF)
Ability to change and configure 802.1x
Prior experience troubleshooting S2S/IPSEC tunnels connection.
Experience conducting VLAN configurations
Preferred Qualifications:
Prior experience with DISA and DISA’s support to mission partners
TS/SCI w/CI Poly Preferred
AWS Cloud service experience
Experience with Palo Alto devices
#itss
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:May 13, 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.
Skills Required
- Active TS/SCI security clearance
- DoD 8570 certification at least IAT level II
- BS in computer science or IT and 4+ years of experience
- Experience monitoring network performance, security, and availability
- Experience in configuring switches and routers
- Prior experience troubleshooting S2S/IPSEC tunnels connection
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
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.
