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# Systems Administrator

- **Company:** TEKSYSTEMS INC.
- **Location:** Richardson, TX, United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Active Directory, Amazon Web Services, Microsoft Azure, Bash Shell, Cloud Computing, CompTIA Security+, Dynamic Host Configuration Protocol, Domain Name System (DNS), VMware ESX Servers, Python (Programming Language), Network Troubleshooting, Linux System Administration, Linux Servers, Networking Basics, Network Planning and Design, Routing, Windows PowerShell, Software Tools, Zero Trust Network Access, Systems Integration, TCP/IP, VMware Infrastructure, Virtual Local Area Networks, Scripting, HybridCloud, Firewalls (Computer Science), SC Clearance, Build Management, Vmware
- **Published:** July 9, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9021363/systems-administrator

## About the Role

Active Secret clearance (required on Day 1)
CompTIA Security+, CISSP, or other DoD 8570-approved certification
5+ years of experience in systems administration (or 3+ years with a related advanced degree)
Hands-on experience with:

VMware / ESXi
Windows & Linux server administration
Networking fundamentals (TCP/IP, DNS, routing, switching, VLANs)
Troubleshooting hardware, software, and infrastructure issues

Experience working in secure or compliance-driven environments (RMF, DFARS)

Nice to Have

Cloud experience (AWS, Azure, hybrid environments)
Automation or scripting (PowerShell, Bash, Python)
Active Directory, DNS, DHCP, Group Policy
Experience supporting engineering tools or multi-vendor network environments

Why This Role Matters
You'll directly support mission-critical systems used in aerospace and defense programs. Your work ensures operational readiness, security, and performance across a complex, high-security ecosystem.

## Description

Seeking a skilled Systems Administrator to support a high-visibility, secure engineering environment. This role is hands-on, technical, and ideal for someone who enjoys working across virtualization, networks, Windows/Linux servers, and secure government systems. You'll support day-to-day operations as well as long-term modernization and Zero Trust initiatives.
This is not a ticket-processing role - you will be a key member of the engineering team supporting mission-critical systems used across the organization.

What You'll Do (Day-to-Day)

Administer, maintain, and troubleshoot VMware / ESXi virtual environments
Manage and support Windows and Linux servers, including patching, updates, and configuration
Support and help design network architecture, including VLANs, firewalls, routing, switching, and system integrations
Resolve complex system, application, or network issues across physical and virtual infrastructure
Build and deploy new servers, harden systems, and maintain compliance with RMF, DFARS, STIGs, and program policies
Work closely with system administrators, network engineers, cybersecurity teams, and program managers
Assist with implementing Zero Trust, hybrid-cloud, and modernization projects
Maintain documentation, support change control, and follow engineering and security processes
Participate in technical discussions, troubleshooting sessions, and design reviews
Support secure environments by monitoring logs, applying patches, and maintaining system baselines


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