Network Administrator - Night Shift

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

Job summary

Leidos in San Antonio, TX seeks a Network Administrator for the 3rd shift (9 PM–5 AM) to join the CESO effort building a secure, automated web service operation. The role focuses on maintaining network availability, monitoring performance, and protecting critical infrastructure in a fast-paced government environment.

Candidates must hold an active TS/SCI clearance, DoD 8570 IAT II certification, a BS in CS or IT or equivalent, and be comfortable with 24/7 shifts.

Qualifications

• Active TS/SCI security clearance with ability to obtain CI poly if required.
• 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 substitute for degree.
• Willingness to work 24×7 shifts, including nights, weekends, and holidays.
• Experience monitoring network performance, security, and availability.
• Experience configuring switches and routers.
• Experience with dynamic routing protocols (BGP, OSPF).
• Ability to configure 802.1x.
• Experience troubleshooting S2S/IPSEC tunnels and VLAN configurations.

Responsibilities

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

Skills

Network monitoring

Routing protocols

Switches/Routers

802.1x

IPSec tunnels

VLAN configurations

S2S/IPSEC troubleshooting

Education

BS in computer science or IT

Tools

Palo Alto devices

AWS Cloud service

Job 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 escalation 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 802.1x
• 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 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 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.

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 $17.2 billion for the fiscal year ended January 2, 2026. 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 here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

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.