Network Administrator

We are currently seeking a Network Administrator 3rd shift (9PM to 5AM) 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 San Antonio, TX 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 with ability to obtain CI poly if required
• Currently possess DoD 8570 certification at least IAT level II, e.g Security+ce.
• BS in computer science or IT and 2+ 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 802.1xPrior 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 2, 2026

Pay Range:

Pay Range $59,150.00 - $106,925.00

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.