Senior Linux Systems Administrator – Azure/AWS

About Us:
GECO Philippines, part of the GECO Asia Group of Companies, is a specialist IT Consulting Services company with headquarters in Singapore and two delivery centers in the Philippines.

We’re Hiring: Senior Linux Systems Administrator – Azure/AWS

We are looking for a Senior Linux System Administrator to provide technical leadership in managing, securing, and continuously improving enterprise Linux environments across on-premises, virtualized, and cloud platforms.

The role will handle complex infrastructure incidents, platform lifecycle activities, automation, security hardening, performance optimization, and major changes across a globally distributed IT environment.

Deployment Setup

Work Arrangement: Hybrid (3 days onsite / 2 days remote)

• ️ Key Responsibilities

• Lead the administration, hardening, monitoring, maintenance, and lifecycle management of enterprise Linux platforms.

• Manage and troubleshoot Red Hat, SUSE, Ubuntu, Rocky, AlmaLinux, and other Linux distributions.

• Lead resolution of complex incidents, root-cause analysis, service restoration, and preventive actions.

• Plan and execute OS patching, upgrades, vulnerability remediation, configuration changes, backup validation, and disaster recovery activities.

• Develop automation and configuration-management solutions using Ansible, Bash, Python, and related tools.

• Perform system performance analysis, capacity planning, kernel tuning, storage management, and troubleshooting.

• Manage Linux services including NFS, CIFS, FTP, syslog, SNMP, and other enterprise services.

• Support Linux environments across VMware, KVM, Nutanix, physical servers, and cloud infrastructure.

• Work with Azure and AWS cloud infrastructure, including compute, networking, storage, identity, monitoring, and disaster recovery.

• Collaborate with Cloud, Network, Security, Database, Application, Service Delivery, and vendor teams.

• Maintain technical standards, documentation, procedures, knowledge articles, and project-to-BAU transition documentation.

• Provide technical guidance, mentoring, and functional supervision to OS administration teams.

• Participate in shifting schedules, on-call rotations, after-hours support, and planned maintenance.

Technical Competencies

• Linux: Red Hat Enterprise Linux, SUSE, Ubuntu, Rocky, AlmaLinux
  Cloud: Microsoft Azure, AWS, Oracle Cloud Infrastructure (OCI)
  Virtualization: VMware, KVM, Nutanix
  Storage: NetApp, Pure Storage, Azure Storage, AWS Storage
  Backup: Veeam, Commvault, Azure/AWS Backup
  DR: Zerto, Azure Site Recovery
  Security: Cortex XDR
  Monitoring: Nagios, BMC/MOMA
  Directory Services: Active Directory, LDAP
  Infrastructure: Dell, Cisco UCS, Oracle Exadata/Exalogic

Qualifications

• 8+ years of infrastructure experience, with at least 7 years of hands-on Linux administration experience.
• Strong expertise in enterprise Linux installation, configuration, patching, troubleshooting, performance tuning, security hardening, recovery, and lifecycle management.
• Strong knowledge of:
  • Red Hat Enterprise Linux and other major Linux distributions
  • Bash, AWK, SED, and basic Perl scripting
  • Ansible and automation
  • LVM and SAN storage using dm-multipath
  • Linux networking and system services
  • User, access, and security management
  • OS hardening and vulnerability remediation
• Experience with Azure and/or AWS cloud infrastructure.
• Experience with VMware and/or KVM virtualization.
• Knowledge of enterprise storage, backup, and disaster recovery solutions.
• Familiarity with Active Directory, LDAP, monitoring, and ITIL processes.
• Strong troubleshooting, analytical, documentation, and stakeholder-management skills.

Preferred Qualifications

• Red Hat Enterprise Linux Automation with Ansible (RH294) training/certification.
• Red Hat Satellite 6 Administration (RH403) training/certification.
• Microsoft AZ-104 and/or AZ-305 training/certification.
• Relevant Linux, Cloud, Automation, Security, or IT Service Management certifications.

Ready to make an impact?
Be part of a team that delivers world-class IT support, empowers users, and keeps business operations running smoothly.

Apply now and help us provide seamless, reliable, and customer-focused service!