Senior Linux Systems Administrator – Azure/AWS

GECO Asia Pte Ltd; Muntinlupa; Hybrid; PHP 1,200,000 - 1,600,000; Full time

Job summary

GECO Philippines, part of the GECO Asia Group, seeks a Senior Linux Systems Administrator to lead and optimize enterprise Linux environments across on-premises, virtualized, and cloud platforms. You will manage complex incidents, lifecycle activities, automation, security hardening, and performance improvements in a globally distributed IT setting.

The role requires strong troubleshooting, incident response, patch management, and collaboration with cross-functional teams.

Qualifications

• 8+ years of infrastructure experience with hands-on Linux administration (7+ yrs).
• Strong expertise in enterprise Linux installation, patching, tuning, and security hardening.
• Experience with Azure and/or AWS cloud infrastructure and virtualization tech.

Responsibilities

• Lead administration, hardening, monitoring, maintenance, and lifecycle management of Linux platforms.
• Plan OS patching, upgrades, vulnerability remediation, backups, and DR activities.
• Develop automation and configuration-management solutions using Ansible, Bash, Python.
• Collaborate with Cloud, Network, Security, and Vendor teams; provide mentorship.

Skills

Linux administration

Incident management

Scripting

Automation

Troubleshooting

Tools

Ansible

Bash

Python

VMware

KVM

Job description

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 Administratorto 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, Comm%C%20a, 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.