Unix System Administrator – Rancher Specialist

Vennote Technologies Limited is a technology company building robust, scalable digital solutions that power businesses. Wespecializein Enterprise Applications, Managed Services, and Project Management,delivering technology solutions that help businesses run more efficiently and scale with confidence. We are recruiting to fill the position below:

Job Title: Unix System Administrator – Rancher Specialist

Location: Lagos

Employment Type: Full-time / Hybrid Role Overview Vennote Technologies is seeking a highly skilled Unix System Administrator – Rancher Specialist to join our enterprise infrastructure team. In this role, you will be responsible for the end-to-end management of our Unix/Linux environments, with a specific focus on container orchestration and cluster management using SUSE Rancher. The ideal candidate bridges the gap between traditional enterprise Linux administration and modern cloud-native container infrastructure, ensuring high availability, robust security, and seamless application delivery across multi-platform environments. Key Responsibilities| Container Orchestration & Rancher Management: Cluster Management: Deploy, configure, and manage enterprise Kubernetes clusters across production and non-production environments using SUSE Rancher. Operations & Scaling: Optimize Rancher for multi-cluster management, ensuring streamlined provisioning, upgrading, and day-2 operations of downstream Kubernetes clusters. Troubleshooting: Diagnose and resolve complex container orchestration issues, ingress routing problems, persistent volume allocations, and node-level failures within the Rancher ecosystem. System Administration & Configuration: Multi-Platform Support: Administer, install, and configure Red Hat Enterprise Linux (RHEL), Solaris, and Oracle Linux environments. Virtualization: Manage and optimize bare-metal and virtualized server performance using modern enterprise virtualization technologies to support containerized workloads. Lifecycle Management: Lead Technology Refresh projects within the Unix/Linux and container domain to ensure infrastructure remains modern, supported, and scalable. Maintenance: Perform OS-level management, including patch updates, kernel fine-tuning, and robust access control. Operations & Monitoring: Account & Access Management: Handle the full lifecycle of user accounts, manage group policies, and implement Role-Based Access Control (RBAC) within both Linux OS and Rancher environments. Performance Monitoring: Proactively monitor server concurrent logins, processor utilization, network traffic, disk space, and Kubernetes cluster health/metrics. Data Protection: Execute regular backup and restore activities (including Velero for Kubernetes/Rancher and traditional OS backups) adhering strictly to corporate disaster recovery procedures. Troubleshooting & Vendor Management: High Availability & Clustering: Apply strong knowledge of traditional clustering technologies and Kubernetes high-availability architectures to maintain uptime and resolve complex failover issues. Vendor Coordination: Collaborate with principal vendors (such as Red Hat, Oracle, and SUSE) to conduct Root Cause Analysis (RCA) and implement permanent fixes for critical infrastructure incidents. Remote Assistance: Provide expert remote technical support for OS installation, configuration, and container platform deployment as needed. Security & Compliance: Infrastructure Hardening: Partner with the security team to apply patches, implement security policies, and perform strict system hardening. Container Security: Implement container security best practices, including image scanning, secure network policies in Rancher, and OS-level hardening. Investigations: Assist in security investigations, log analysis, and audit compliance activities. Technical