Position Summary
KBC Technologies is actively seeking an experienced, high-caliber, and technical Linux Administrator – L3 with extensive progressive professional experience in enterprise Linux systems administration, L3 incident escalation, and infrastructure optimization to join our client’s technology team on a full-time permanent on-site basis in Qatar (immediate joiners preferred). In this critical systems engineering role, you will be responsible for installing, configuring, upgrading, and maintaining complex enterprise Linux servers, handling L3 troubleshooting, and ensuring uncompromised system stability, high availability, and operational excellence. You will leverage your deep specialist expertise in Red Hat Enterprise Linux (RHEL), Rocky Linux, CentOS, Ubuntu, Oracle Linux, LVM, Pacemaker/Corosync clustering, and performance monitoring to deliver robust infrastructure solutions. This opportunity offers competitive compensation, executive technical visibility, and exceptional career growth prospects within a premier global IT staffing and technology consulting enterprise.
Detailed Job Description
Your day-to-day responsibilities include managing system services, user permissions, kernel upgrades, and patch management across RHEL, Rocky Linux, CentOS, Ubuntu, and Oracle Linux, resolving complex production incidents escalated by L1 and L2 support teams, troubleshooting kernel panics, boot failures, high CPU utilization, memory leaks, and disk I/O bottlenecks, monitoring resource utilization via Zabbix, Nagios, or Prometheus/Grafana, managing partitions, LVM, XFS/ext4 filesystems, and SAN/NAS integration, configuring high-availability clusters using Pacemaker and Corosync, implementing security hardening based on CIS benchmarks, and integrating with LDAP or Active Directory. You will utilize your proactive troubleshooting and analytical problem‑solving skills to resolve complex infrastructure anomalies under strict enterprise service level agreements.
Key Responsibilities
- 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 utilizing Zabbix, Nagios, Prometheus, Grafana, or enterprise monitoring suites.
- Manage partitions, filesystems (XFS/ext4), mount points, disk expansion, Logical Volume Manager (LVM), and SAN/NAS storage integration.
- Configure and troubleshoot Linux high‑availability solutions, Pacemaker and Corosync clusters, and disaster recovery (DR) failovers.
- Implement Linux security hardening, SSH security, sudo access, PAM, firewall rules, SELinux, and centralized authentication (LDAP/Active Directory).
Required Qualifications & Skills
- Bachelor’s degree in Computer Science, Information Technology, Systems Engineering, or a related technical discipline.
- Minimum of 5 to 8 years of progressive professional experience in enterprise Linux systems administration and infrastructure support.
- Strong, demonstrable hands‑on professional expertise in Red Hat Enterprise Linux (RHEL), Rocky Linux, CentOS, Ubuntu, and Oracle Linux.
- Deep practical proficiency in L3 troubleshooting, log analysis (journalctl, dmesg), and root cause analysis methodologies.
- Solid practical experience with storage management, LVM, XFS/ext4 filesystems, SAN/NAS, and multipathing.
- Comprehensive working knowledge of high‑availability clustering (Pacemaker/Corosync), networking, and security hardening (CIS benchmarks).
- Exceptional analytical, troubleshooting, debugging, and problem‑solving capabilities under mission‑critical conditions.
- Excellent written and verbal English communication skills with strong cross‑functional collaboration abilities.
- Mandatory legal work eligibility and physical availability for full‑time on‑site operations in Qatar, with immediate joining capability.
Nice-to-Have-Skills
- Professional certifications such as Red Hat Certified Engineer (RHCE) or Red Hat Certified System Architect (RHCSA).
- Prior professional working experience in top‑tier banking, telecommunications, or large enterprise data centers.
- Hands‑on familiarity with configuration management tools (Ansible, Puppet) and containerization platforms (Docker, Kubernetes).
- Experience with cloud computing platforms (AWS, Azure, GCP) and infrastructure automation scripting (Bash, Python).
Application Information
Salary/Rate: Market Competitive / Enterprise Technology Package
Deadline: Open until filled (Urgent Qatar On-Site Opening – Immediate Joiners Only)
Notice Period: Immediate Joining Required (Mandatory Requirement)
Contract Duration: Permanent / Full-Time On-Site Engagement (Qatar)
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