Windows/Linux System Administrator

Job Title: Windows/Linux System Administrator

Location: Onsite (Killeen, TX)

Type: Full-time

No CTC or 3rd party vendors

Overview:

New position supporting a primarily Windows environment transitioning toward Linux. This role will start with core Sys Admin responsibilities and evolve into a Linux-focused SME as the environment grows. You’ll partner closely with the Dev team, which currently supports Linux, and help drive new capabilities—especially around containerization.

Key Responsibilities:

• Administer and support mixed environment (Windows + Linux, moving toward Linux focus)
• Serve as Linux SME for day-to-day operations (Red Hat 7/8/9; currently on 8)
• Partner with Dev team to stabilize and expand Linux capabilities
• Support and explore containerization initiatives (OpenShift/Kubernetes/Docker)
• Manage patching, security compliance, and system performance
• Troubleshoot OS, server, and application issues
• Participate in on-call rotation (5-week, Fri–Fri)

Qualifications:

• 2–4 years Linux administration experience (Red Hat preferred)
• Strong Windows Systems Administration background
• Exposure to containerization (hands-on preferred over certifications)
• Understanding of security, patching, and vulnerability management
• Familiarity with scripting, CI/CD, or automation tools is a plus
• Strong troubleshooting, communication, and self-starter mindset

GDT IS AN EQUAL OPPORTUNITY EMPLOYER. Applicants and employees are considered for positions and are evaluated without regard to mental or physical disability, race, color, religion, gender, national origin, age, genetic information, military or veteran status, sex, marital status, gender identity or any other protected Federal, State/Province or Local status unrelated to the performance of the work involved.