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Linux Administrator

3 hours ago

Dubai, Dubai, United Arab Emirates Habib Bank AG Zurich Full time

Job Summary

We are seeking a skilled Linux System Administrator to manage and scale our enterprise Linux estate. You will ensure stability, security, and performance of RHEL-based platforms, automate operational tasks, and support business-critical workloads. Candidates with advanced certifications (RHCE/RHCA) will additionally drive architecture, automation at scale, and platform engineering initiatives.

Key Responsibilities

Core Responsibilities

Install, configure, and maintain RHEL 9/10 and related Linux distributions.

  • Manage users, groups, permissions, and centralized authentication (IdM/LDAP/AD via SSSD/realmd).
  • Configure and support network services (DNS, DHCP, NTP, SSH, firewall) and troubleshoot TCP/IP issues.
  • Implement patch management, vulnerability remediation, and security hardening (CIS/SCAP, SELinux).
  • Manage storage (LVM, XFS/ext4, iSCSI, NFS, SMB) and backup/restore procedures.
  • Provision systems via Kickstart and Red Hat Satellite; maintain content views and lifecycle environments.
  • Monitor and tune performance (CPU, memory, IO, network) using native tools (top, vmstat, sar, ss, iostat).
  • Automate tasks with Bash and Ansible (playbooks, roles, inventories).
  • Maintain documentation, runbooks, and SOPs.
  • Participate in on-call rotation and incident/problem management (ITIL).

Advanced Responsibilities

  • Design secure, scalable RHEL platform architectures—HA, DR, and multi-site patterns.
  • Architect multi-location Satellite + Capsule topology; optimize content sync, PXE/Kickstart flows, and remote execution at scale.
  • Build enterprise Ansible stacks (Collections, AWX/Automation Controller/Tower); implement config-as-code, policy-as-code, and GitOps workflows.
  • Lead hardening baselines (STIG/CIS), SELinux policy tuning, file integrity, certificate automation (IdM/ACME), and vulnerability mgmt integration.
  • Define SLIs/SLOs, implement logging/metrics/tracing (e.g., RHEL Performance Co-Pilot, Prometheus), and conduct capacity planning.
  • Design secure container hosts (Podman/OpenShift edge), image pipelines, and hybrid integrations (VMware/KVM, AWS/Azure).
  • Implement access control (HBAC), sudo policies, MFA, and periodic access reviews, champion audit readiness.
  • Own DR runbooks, chaos/game days, backup strategy validation, and RTO/RPO adherence.
  • Establish coding standards, reusable Ansible roles, golden images, guardrails, and mentor L1/L2 engineers.

Required Skills & Qualifications

  • 5–10 years
    (Senior) Linux administration experience.
  • Strong knowledge of
    system
    , SELinux,
    SSSD/realmd
    , and
    firewall
    .
  • Proven experience with
    Ansible
    ,
    Satellite
    ,
    Kickstart
    ,
    LVM
    , and
    networking
    .
  • Familiarity with
    virtualization
    (KVM/VMware) and exposure to
    cloud
    (AWS/Azure/OpenStack).
  • Scripting:
    Bash
    (required),
    Python
    (preferred).
  • Certifications
    : RHCSA/RHCE preferred; RHCA or Red Hat Specialist exams are a plus.