Linux OS System Administrator

This position functions around the clock, 24/7/365, to deliver extensive support for the enterprise RHEL server environment. The role involves the installation, configuration, management, operation, and maintenance of all RHEL server systems and RHEL Clusters (including Pacemaker). It is essential to ensure system stability through daily operations, patch management, monitoring, and troubleshooting, as well as providing support for SAP environments that operate on RHEL. Key Responsibilities: - Install, configure, and manage Linux servers and applications to ensure optimal performance and high availability. - Monitor system performance, perform routine maintenance, and apply updates as needed. - Identify and resolve issues related to the operating system, hardware, and network configurations. - Implement and enforce security best practices within Linux environments, including firewalls, user permissions, and file integrity measures. - Assist in the deployment and management of applications hosted on Linux servers. - Document system configurations, procedures, and troubleshooting documentation for reference by the team. - Support backup and recovery processes to maintain data integrity and availability. - Collaborate with development teams to enhance deployment processes and ensure effective integration of Linux applications. Ensure that all RHEL systems are managed in accordance with vendor recommendations and security best practices, while also maintaining compliance with NCA, NIC, and SEC Cybersecurity regulations. - Contribute to the management of the operating system lifecycle, including planning for version upgrades and decommissioning. - Install, configure, manage, operate, and maintain RHEL server systems and clusters (e.g., RHEL 7, 8, 9). Provide daily operational support, including OS installation, monitoring, troubleshooting, virus protection, and resource management. Manage RedHat HA Extension (PACEMAKER) clusters and support SAP, SAP HANA, and SAP S/4HANA environments on the RHEL platform. Regularly review system logs and OS behavior to proactively monitor and address potential issues. - Build strong relationships with the ERP, application, database, and web hosting teams for daily support, troubleshooting, and scheduled maintenance activities. - Manage and maintain client agents for server monitoring (SCOM, AppDynamic) and server management (SCCM). Create and maintain technical and detailed design documentation, as well as technical operation documentation. Create, maintain, and delete user/group accounts and implement account policies. Raise and manage support tickets with RedHat, including troubleshooting, log collection, and follow-up.