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About the Role

TISTA Science and Technology is seeking a Linux/UNIX 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.

Responsibilities

Administer enterprise Linux systems and cloud infrastructure across AWS, Azure, Google Cloud, and OCI.
Perform OS installation, maintenance, troubleshooting, monitoring, and security hardening in on-premise and multi-cloud environments.
Support 24x7x365 operations, including alternate shifts, and adhere to SOPs, security standards, and change-control procedures.
Perform routine Linux/UNIX system administration tasks, maintain logs, and ensure system efficiency and reliability.
Troubleshoot systems, networks, and high-availability environments; apply debugging protocols and implement corrective actions.
Install operating systems using automated tools (Kickstart, Jumpstart, Ignite) and follow all SOPs.
Apply VA-approved OS hardening, configure file systems and backup clients, and install layered software (Apache, WebLogic, Oracle DB, Tuxedo).
Apply OS patches, firmware updates, and vendor patch sets; manage user accounts; monitor system logs and escalate issues as needed.
Implement security hardening per Service Requests and Change Requests; follow local SOPs for daily operations.
Support incident and problem resolution; participate in fault isolation; open vendor support cases when needed.
Resolve OS-related issues during scheduled maintenance windows.
Administer Linux systems across AWS, Azure, Google Cloud, and OCI; troubleshoot cloud production issues across compute, storage, networking, and identity services.
Perform cloud patching, vulnerability remediation, controlled maintenance, and ensure monitoring and backup readiness across platforms.

Requirements

Proven Linux/UNIX system administration experience, including complex troubleshooting and high-availability systems.
Hands-on experience with automated provisioning (Kickstart, Jumpstart, Ignite).
Knowledge of OS patching, security hardening, monitoring, and backup tools.
Familiarity with Apache, WebLogic, Oracle DB, and Tuxedo.
Ability to pass a Tier 4/HIGH Background Investigation.

Skills

Linux/UNIX System Administration
AWS
Azure
Google Cloud
OCI
OS Installation
System Maintenance
Troubleshooting
Monitoring
Security Hardening
Automated Provisioning
Kickstart
Jumpstart
Ignite
OS Patching
File System Configuration
Backup Client Configuration
Apache
WebLogic
Oracle DB
Tuxedo
Incident Resolution
Problem Resolution
Fault Isolation
Vendor Support Case Management
Cloud Patching
Vulnerability Remediation
Controlled Maintenance

Location

Austin, TX

Work Type

On-site
Full-time

Experience Level

8 years of relevant experience may substitute for education

Education Level

Bachelor’s degree in computer science, electronics engineering or related technical discipline

Benefits

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

About the Company

TISTA Science and Technology is seeking a Linux/UNIX 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.