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Salary
$73k – $133k per year
Location
In office (Arlington)
Seniority
Middle · 4+ years exp
Visa
H-1B filings in 12 months: 50 · green card filings: 24
Employment
Full-Time

First seen by Alion on Oct 7, 2026. Leidos scores B on the Alion truth index.

Overview
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Impact
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Leidos is an American technology and engineering services company created in 2013 when Science Applications International Corporation split in two, with Leidos taking the technical services and solutions business. It is one of the largest suppliers to the United States government, working across defence programmes, intelligence systems, civil agencies including the Federal Aviation Administration, and healthcare services for the Department of Veterans Affairs. Headquartered in Reston, Virginia, the company also builds security detection products for airports and borders, and has concentrated recent investment on trusted artificial intelligence and autonomy for mission environments.

We are currently seeking a Network Administrator 1st Shift (6AM to 2PM) to join the Compartmented Enterprise Services Office (CESO) effort. This program is establishing a modern secure web service (SWS) operation as part of a state-of-the-art, highly automated platform capable of supporting a rapidly expanding customer population. Apply today to become part of the Leidos team that is assisting CESO as they migrate to a high security cloud environment by leading day to day operations activities and incident response for assigned shift.

This position is based in Rosslyn, VA and is 100% on-site.

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·
  • Comfortable working 24×7 shifts, including nights, weekends, and holidays.
  • 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

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:

October 7, 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:

Pay Range $73,450.00 - $132,775.00

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.

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