Senior Linux & Windows Server Administrator (Oracle Cloud Infrastructure)

Role Summary

OCI Compute and Instance Management

• Provision and manage OCI virtual machine, Bare Metal, and Flex compute instances running Oracle Linux, RHEL, and Windows Server.
• Configure instance metadata, cloud-init scripts, custom images, golden images, image pipelines, instance pools, autoscaling, and capacity reservations.
• Manage boot and block volumes, volume groups, backup policies, cross-region replication, OCI Bastion, and OS Management Hub.

Oracle Linux and RHEL Administration

• Install, configure, and administer Oracle Linux 8/9 and RHEL 8/9 across OCI and on-premises environments.
• Tune kernel parameters, sysctl settings, Huge Pages, and NUMA for enterprise workloads.
• Manage packages, repositories, LVM, file systems, storage protocols, systemd services, scheduled jobs, SELinux, firewalld, and iptables or nftables.

Windows Server Administration

• Install, configure, and manage Windows Server 2019, 2022, and 2025 on OCI.
• Administer Active Directory Domain Services, Group Policy, DNS, DHCP, IIS, file and print services, WSUS, and failover clustering.
• Configure Remote Desktop Services, Windows Admin Center, storage, permissions, iSCSI, Windows patching, Defender, and firewall controls.

Patching and Security

• Design and execute patching strategies across Oracle Linux, RHEL, and Windows Server using OCI OS Management Hub and other enterprise tools.
• Track support lifecycles, end-of-life dates, upgrade requirements, patch compliance, exceptions, maintenance windows, and rollback plans.
• Apply CIS benchmarks, encryption, privileged access controls, authentication protections, audit logging, and compliance remediation.

Networking and Performance

• Configure OCI VNICs, secondary VNICs, operating-system bonding or teaming, DNS, NTP, routing, firewalls, VPNs, and proxy settings.
• Troubleshoot MTU, TCP, latency, and other operating-system connectivity issues across OCI networks.
• Monitor and tune CPU, memory, storage, and network performance using OCI services and tools such as sar, vmstat, iostat, and perfmon.

Automation and Infrastructure as Code

• Develop and maintain operating-system automation using Ansible, Terraform with the OCI provider, and OCI Resource Manager.

Experience

• 8–10 years of relevant experience.
• Deep expertise in Oracle Linux, RHEL, and Windows Server across OCI and hybrid environments.