Linux Administrator

Linux Administrator with Kubernetes experience who is a technical professional responsible for managing and maintaining Linux operating systems, with a strong focus on deploying, scaling, and managing containerized applications using Kubernetes with on-premise environments; ensuring high availability, performance, and security of the infrastructure while collaborating with application/operation teams to streamline application deployments and lifecycle management.

Project Specific Responsibilities:

· Linux System Administration:

· Installing, configuring, and patching Red Hat Linux operating systems across virtual servers.

· Managing user accounts, permissions, and file systems.

· Monitoring system health, performance metrics, and resource utilization.

· Troubleshooting system issues and implementing corrective actions.

· Monitoring backups and disaster recovery procedures.

· Ability to understand, configure network settings, manage firewalls, and ensure system security.

· Kubernetes Cluster Management:

· Deploying, scaling, and managing Kubernetes clusters on-prem using Rancher(RKE2)

· Patching fixes from software vendor including Kubernetes and some CI/CD components.

· Reviewing and possibly installing Kubernetes components like pods, deployments, services, and ingress controllers.

· Implementing Kubernetes best practices for security, networking, and storage.

· Monitoring Kubernetes cluster health, identifying and resolving performance bottlenecks.

· Experience with Velero backups.

· Containerization and Orchestration:

· Reviewing Docker images for applications.

· Orchestrating container deployments and updates using Kubernetes.

· Managing container lifecycles including scaling, rolling updates, and graceful termination.

· DevOps Collaboration:

· Working closely with deployment teams to integrate applications with Kubernetes.

· Implementing/supporting CI/CD pipelines for automated application deployments.

· Providing technical support for application deployment and troubleshooting.

· Security and Compliance:

· Implementing security measures within Kubernetes clusters (RBAC, network policies, security contexts).

· Monitoring for security vulnerabilities and patching systems promptly.

· Ensuring compliance with industry regulations and security standards.

· General :

• Maintain detailed documentation.
• Troubleshoot and resolve hardware and software issues to ensure system uptime and consistency.
• Plan and manage backup, recovery, and failover processes to ensure business continuity.
• Apply security updates, configure firewalls (e.g., iptables, firewalld), and collaborate with the security team to address vulnerabilities.
• Manage user accounts, permissions, and group policies to maintain system integrity.
• Set up and manage network interfaces, routing configurations, and VLANs
• Provide technical support to users, assisting the helpdesk team or users with issue resolution.
• Collaborate with cross-functional teams to ensure seamless system integration and support.

Project Minimum Requirements:

• This position supports systems that require 24x5 uptime.
• Candidates must be willing and able to meet recall requirements, including participation in a rotational on-call schedule.
• Candidates must reside within a commutable distance from Vacaville, CA, and be prepared to work onsite at the customer's discretion.
• Onsite presence is required during the transition period and as needed thereafter.
• High School Diploma, GED, or equivalent
• 10 years of experience working as a system admin on Unix/Linux systems, related experience is acceptable.
• Proficient in Linux system administration: Shell scripting (Bash), system configuration, network management.
• Deep understanding of Kubernetes architecture and concepts: Deployments, pods, services, ingress controllers, storage, networking
• Experience with containerization technologies like Docker, Containerd and Podman.
• Familiarity with implementation with Redhat 8.X or 9.X, running Kubernetes.
• Knowledge of CI/CD pipelines and automation tools
• Strong troubleshooting and problem-solving abilities
• Experience with Helm charts for managing Kubernetes applications.
• Knowledge of Dynatrace or Prometheus and Grafana for monitoring Kubernetes clusters

Desired Skills:

• Familiarity with Nexus, Argo CD and Gitea.
• Knowledge of VMware and NSX.
• Familiarity with GE GridOS
• Certified Kubernetes Administrator (CKA): Validates skills in Kubernetes administration.

· Linux Professional Institute Certification (LPIC): Recognizes expertise in Linux system administration.