Network Administrator - Night Shift

Leidos; San Antonio (TX); On-site; USD 59,000 - 107,000; Full time

Job summary

Leidos in San Antonio, TX is seeking a Network Administrator (3rd shift, 9 PM–5 AM) for the CESO program to support a secure web service platform.

This on-site role requires a TS/SCI clearance with CI poly and DoD 8570 IAT II certification, plus a BS in CS/IT or equivalent and 2+ years of experience. The position covers network monitoring, maintenance, security and user access support.

Qualifications

• Active TS/SCI clearance with CI poly if required.
• DoD 8570 IAT II certification (e.g., Security+ ce).
• Bachelor's degree in CS or IT with 2+ years of experience.
• Willing to work 24x7 shifts, including nights, weekends and holidays.
• Experience monitoring network performance, security and availability.
• Experience configuring VLANs.

Responsibilities

• Monitor network connections and performance to ensure availability.
• Identify risks and mitigate network issues.
• Plan and implement network maintenance, installation and security.
• Receive and review user requests for access to services.
• Troubleshoot and escalate complex problems to senior engineers or vendors.
• Configure, install and maintain network devices and software.

Skills

Network monitoring

Troubleshooting

Network security

Routing protocols

Device configuration

On-site work

User support

Education

BS in Computer Science or IT

Tools

Switches and routers

BGP

OSPF

802.1x configuration

IPsec tunnels

Job description

Description

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.

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 elevate 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 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 $59,150.00 - $106,925.00

The Leidos pay range for this job level is a general guideline onlyand 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.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [e-mail].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.