Senior Linux Administrator L3 - Onsite Qatar

KBC Technologies; Qatar; Presencial; QAR 134.000 - 246.000; Jornada completa

Descripción de la vacante

KBC Technologies is seeking an experienced Linux Administrator – L3 for a full-time on-site role in Qatar. You will install, configure, upgrade, and maintain enterprise Linux servers (RHEL, Rocky Linux, CentOS, Ubuntu, Oracle Linux) and lead L3 incident resolution to ensure high availability.

Strong clustering, security hardening, and cross-team collaboration are essential. You will monitor systems with Zabbix/Nagios/Prometheus, manage LVM, XFS/EXT4, and SAN/NAS, and implement CIS benchmarks and

Formación

• Bachelor's degree in Computer Science, Information Technology, Systems Engineering, or a related technical discipline.
• 5–8 years of progressive enterprise Linux administration and infrastructure experience.
• Strong hands-on expertise in RHEL, Rocky Linux, CentOS, Ubuntu, and Oracle Linux.
• Deep practical proficiency in L3 troubleshooting, log analysis (journalctl, dmesg), and RCA methodologies.
• Solid storage management experience (LVM, XFS/ext4, SAN/NAS, multipathing).
• Experience with high-availability clustering (Pacemaker/Corosync) and CIS security hardening.

Responsabilidades

• Install, configure, upgrade, and maintain enterprise Linux servers across RHEL, Rocky Linux, CentOS, Ubuntu, and Oracle Linux distributions.
• Manage system services, kernel upgrades, patch management, security updates, package repositories (YUM/DNF, APT), and systemd services.
• Handle complex L3 production incidents, perform root cause analysis (RCA), and provide technical recovery plans for recurring system failures.
• Troubleshoot kernel panics, boot failures, filesystem corruption, high CPU utilization, memory leaks, and disk I/O bottlenecks.
• Monitor CPU, memory, disk, and network resource utilization using Zabbix, Nagios, Prometheus, Grafana, or enterprise monitoring suites.
• Configure and troubleshoot Linux high-availability solutions (Pacemaker/Corosync) and DR failovers.
• Implement Linux security hardening, SSH security, sudo access, PAM, firewall rules, SELinux, and centralized authentication (LDAP/AD).

Conocimientos

Linux administration

Incident escalation

Analytical problem solving

On-site operations

Educación

Bachelor's degree in Computer Science/IT/related

Herramientas

RHEL

Rocky Linux

CentOS

Ubuntu

Oracle Linux

LVM

XFS

EXT4

Pacemaker

Corosync

Zabbix

Nagios

Prometheus

Grafana

LDAP/AD

SSH

SELinux

PAM

YUM/DNF

APT

Descripción del empleo

KBC Technologies is seeking an experienced Linux Administrator – L3 for a full-time on-site role in Qatar. You will install, configure, upgrade, and maintain enterprise Linux servers (RHEL, Rocky Linux, CentOS, Ubuntu, Oracle Linux) and lead L3 incident resolution to ensure high availability.

Strong clustering, security hardening, and cross-team collaboration are essential. You will monitor systems with Zabbix/Nagios/Prometheus, manage LVM, XFS/EXT4, and SAN/NAS, and implement CIS benchmarks and