Senior Windows System Administrator

TISTA Science and Technology Corporation•Austin, TX

23h•Onsite

About The Position

TISTA Science and Technology is seeking a Senior Windows System Administrator to join our growing team. At TISTA, you’ll do meaningful, mission‑driven work that improves lives alongside teammates you trust and leaders who are transparent and supportive. We invest in your learning and internal mobility so you can build a career that keeps advancing. We’re proud to serve and hire Veterans, and we put people first in everything we do. TISTA associates enjoy above Industry Healthcare Benefits, Remote Working Options, Paid Time Off, Training/Certification opportunities, Healthcare Savings Account & Flexible Savings Account, Paid Life Insurance, Short-term & Long-term Disability, 401K Match, Professional development reimbursement, Employee Assistance Program, Paid Holidays, Military Leave, and much more! Senior Windows System Administrator to design, implement, and support enterprise infrastructure environments. This role requires expertise in Windows Server administration along with hands-on experience in container platforms such as OpenShift and Kubernetes, and virtualization technologies. The ideal candidate will play a key role in maintaining system reliability, performance, and security across hybrid environments.

Requirements

5–10+ years of experience in Windows system administration.
Strong expertise in: Windows Server administration.
Active Directory & Group Policy.
PowerShell scripting.
Hands-on experience with: Kubernetes
Red Hat OpenShift
Virtualization platforms (VMware vSphere and/or Hyper-V).
Experience with system monitoring tools and backup solutions.
Knowledge of networking fundamentals (TCP/IP, firewalls, load balancing).
Bachelor’s degree in computer science, electronics engineering or related technical discipline and 5+ years’ work experience.
Eight (8) years of additional relevant experience may be substituted for education (13 years total).
The ability to pass a Tier 2/Moderate Background Investigation.

Nice To Haves

Familiarity with Infrastructure as Code (Terraform, Ansible).
Red Hat or Kubernetes certifications (e.g., CKA, OpenShift Administrator).

Responsibilities

Administer, maintain, and support Windows Server environments (2016/2019/2022).
Manage Active Directory, Group Policy, DNS, DHCP, and IIS.
Design and support virtualized environments (VMware, Hyper-V).
Deploy, manage, and troubleshoot containerized applications using Kubernetes and OpenShift.
Monitor system performance and ensure high availability and disaster recovery readiness.
Automate system administration tasks using PowerShell and scripting tools.
Collaborate with DevOps and application teams to support CI/CD pipelines.
Implement and enforce security best practices, patch management, and compliance standards.
Troubleshoot complex system, network, and application issues.
Maintain system documentation, procedures, and configurations.
Provide mentorship and guidance to junior administrators.