Experience: L2 : 6+ Years, L3 10+ Years
Support Coverage: 24x7 Shift Support
Location: Singapore
We are seeking an experienced Unix L2/L3 Support Engineer with strong expertise in Linux (RedHat), Solaris, and AIX administration to provide 24x7 operational support for enterprise datacenter and cloud environments. The role involves incident management, problem determination, system administration, automation, infrastructure support, performance optimization, patch management, and ensuring high availability of critical business services.
The candidate should possess strong troubleshooting skills across Unix platforms, cloud technologies, automation tools, clustering solutions, and infrastructure management frameworks.
Provide L2 administration and operational support for Linux, Solaris, and AIX servers across Data Center and Cloud environments.
Perform installation, configuration, administration, patching, upgrades, migration, and lifecycle management of Unix/Linux platforms.
Manage virtualization technologies including:
Solaris Zones and LDOMs
AIX LPARs and VIOS
Perform OS hardening, capacity management, performance tuning, and system optimization.
Troubleshoot server, operating system, hardware, storage, and application-related issues.
Handle break-fix activities and service restoration within agreed SLAs.
Create and maintain environments for batch processing and associated reporting systems.
Manage Red Hat Satellite for patching, provisioning, and lifecycle management.
Administer Centrify, IBM GPFS, Puppet, and Ansible environments.
Support Docker and Kubernetes platforms.
Manage AWS and Azure virtual machine deployments and administration.
Support storage integration, clustering, partitioning, and virtualization technologies.
Provide support for HA and Cluster technologies.
Hands-on experience in Ansible and/or Terraform for infrastructure provisioning, configuration management, and automation.
Strong scripting skills using Shell Scripting, Python to automate operational and administrative tasks.
Develop, maintain, and enhance automation workflows, reusable playbooks, and Infrastructure-as-Code (IaC) solutions.
Drive continuous improvement initiatives to reduce manual effort and improve operational efficiency.
Automate patching, monitoring, reporting, server provisioning, and compliance-related activities.
Monitor infrastructure health and proactively address issues.
Participate in incident, problem, and change management processes.
Perform root cause analysis (RCA) and provide corrective and preventive actions.
Collaborate with application, network, cloud, storage, and security teams during major incidents.
Support system integration and production rollout activities.
Provide 24x7 operational support, monitoring, incident management, and troubleshooting to ensure service availability and business continuity.
Participate in shift-based support, on-call rotations, weekend support, and major incident management.
Ensure compliance with SLA, OLA, and operational standards.
Support planned maintenance activities and emergency changes whenever required.
Red Hat Enterprise Linux (RHEL)
Sun Solaris
IBM AIX
Solaris LDOMs
AIX LPARs
AIX VIOS
GPFS
Centrify
Ansible
Terraform
Puppet
Shell Scripting
Python
Infrastructure as Code (IaC)
Docker
Kubernetes
Performance Monitoring
Capacity Management
Patch Management
Incident Management
Problem Management
Change Management
Root Cause Analysis
High Availability (HA) Solutions
OS Clustering Technologies
Bachelor's Degree in Engineering, Computer Science, Information Technology, or related field.
Minimum 6+ years of experience in Unix/Linux system administration and support.
Strong troubleshooting experience in Linux, Solaris, and AIX environments.
Experience supporting enterprise-scale infrastructure in data center and cloud environments.
Excellent verbal and written communication skills.
Strong analytical, problem-solving, and customer management skills.
One or more of the following certifications preferred:
Strong customer focus and stakeholder management skills.
Ability to work independently in a 24x7 support environment.
Experience in large enterprise infrastructure operations.
Knowledge of ITIL processes and service management practices.
Continuous improvement mindset with focus on automation and operational excellence.
HCLTech is a global technology company, home to more than 226,600 people across 60 countries, delivering industry-leading capabilities centered around digital, engineering, cloud and AI, powered by a broad portfolio of technology services and products. We work with clients across all major verticals, providing industry solutions for Financial Services, Manufacturing, Life Sciences and Healthcare, Technology and Services, Telecom and Media, Retail and CPG, and Public Services. Consolidated revenues as of 12 months ending September 2025 totaled $14.2 billion. To learn how we can supercharge progress for you, visit hcltech.com.
