Senior Linux System Engineer

Overview TISTA Science and Technology is seeking a Senior Linux System Engineer 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! Responsibilities Install, configure, and maintain Linux servers Manage system performance, uptime, and reliability across production and staging environments. Implement and maintain user accounts, permissions, and system policies. Apply system updates, patches, and security configurations regularly. Deploy, configure, and manage cloud resources (VMs, storage, networking, databases, and load balancers). Manage Infrastructure as Code (IaC) using tools such as Terraform, Ansible, or CloudFormation. Design and implement backup, disaster recovery, and failover strategies. Monitor cloud performance and optimize cost and efficiency. Configure and maintain firewalls, VPNs, routing, and network security groups. Implement identity and access management (IAM) policies and role-based access controls. Ensure compliance with data protection and security best practices. Automate operational processes and deployments using shell scripts, Python, or PowerShell. Support CI/CD pipelines for software delivery. Work closely with DevOps teams to support containerization (Docker, Kubernetes). Utilize monitoring tools (Prometheus, Grafana, CloudWatch, Azure Monitor, etc.) to ensure system health. Troubleshoot performance issues, outages, and configuration problems. Provide on‑call support as part of a rotating schedule. Qualifications Strong proficiency in Linux system administration (CentOS, Ubuntu, Red Hat). Hands‑on experience with Azure/AWS cloud services (EC2, S3, VPC, Azure VM, Azure Storage, etc.). Familiar with IaC tools (Terraform, Ansible, CloudFormation). Experience with scripting languages (Bash, Python, PowerShell). Understanding of networking fundamentals, VPNs, DNS, load balancing, and firewalls. Knowledge of containerization (Docker, Kubernetes) is a plus. Experience with monitoring and logging tools (CloudWatch, Azure Monitor, Grafana, ELK stack). Strong analytical and problem‑solving skills. Excellent communication and teamwork abilities. Ability to manage multiple priorities in a fast‑paced environment. Commitment to documentation, process improvement, and operational excellence Preferred Certifications AWS Certified SysOps Administrator or Solutions Architect. Microsoft Certified: Azure Administrator Associate. AWS Certified SysOps Administrator or DevOps Engineer. Linux Certified: Azure Administrator or DevOps Engineer Expert. Certified Kubernetes Administrator (CKA). Experience in chaos engineering, capacity modeling, or SRE tooling. Education Master’s degree in computer science, electronics engineering or related technical discipline and 10+ years’ work experience. Ten (10) years of additional relevant experience may be substituted for education (20 years total). Clearance The ability to pass a Tier 4/HIGH Background Investigation. Location Department of Veteran's Affairs (100% On‑site) Monday - Friday (8:00 AM - 4:30 PM CST Time) Austin Information Technology Center (AITC) 1615 Woodward Street, Austin, TX 78741 #J-18808-Ljbffr TISTA Science and Technology