Infrastructure Engineer (L2/L3 Support)

COMBUILDER PTE LTD; Singapore; On-site; SGD 90,000 - 150,000; Full time

Job summary

COMBUILDER PTE LTD in Singapore is seeking an experienced Infrastructure Engineer with 6+ years in enterprise IT infrastructure management. The role focuses on Windows Server, RHEL, VMware, NSX, Dell EMC SAN, Brocade SAN, and Cisco networking to ensure high availability, performance, security, and reliability of critical systems.

You will handle L2/L3 support, on-call incidents, storage and network administration, disaster recovery, and collaboration with vendors and teams to drive

Qualifications

• Bachelor's degree in Computer Science, Information Technology, Engineering, or a related discipline.
• Minimum 6 years of hands-on experience in enterprise infrastructure administration and operations.
• Proven experience supporting large-scale production environments.
• Excellent troubleshooting and problem-solving skills.
• Strong communication and stakeholder management abilities.

Responsibilities

• Administer and maintain Windows Server environments, including installation, configuration, patching, upgrades, and troubleshooting.
• Manage and support Red Hat Enterprise Linux (RHEL) servers in production environments.
• Monitor server health, system performance, and capacity utilization.
• Perform infrastructure maintenance, upgrades, and lifecycle management activities.
• Manage VMware vSphere infrastructure, including ESXi hosts and vCenter Server.
• Provision, configure, and maintain virtual machines based on business requirements.
• Perform VM migrations, resource optimization, and capacity planning.
• Troubleshoot virtualization-related issues and implement performance improvements.
• Support and maintain VMware NSX virtual networking and security solutions.
• Configure logical switching, distributed routing, firewall policies, and security groups.
• Troubleshoot network virtualization and connectivity issues.
• Administer Dell EMC SAN Storage environments.
• Perform storage provisioning, LUN creation, masking, mapping, and capacity planning.
• Monitor storage utilization and performance metrics.
• Support storage optimization, upgrades, and disaster recovery initiatives.
• Administer Brocade SAN switches and Fibre Channel fabrics.
• Configure zoning and troubleshoot SAN connectivity issues.
• Monitor SAN performance and ensure high availability of storage services.
• Manage and support Cisco switching infrastructure.
• Configure VLANs, trunking, port channels, and switch connectivity.
• Troubleshoot network-related incidents and performance issues.
• Support implementation and maintenance of network standards and best practices.
• Provide Level 2 and Level 3 support for infrastructure-related incidents and service requests.
• Act as an escalation point for critical production issues.
• Perform root cause analysis (RCA) and implement preventive solutions.
• Coordinate with vendors, application teams, and technical stakeholders to resolve complex issues.
• Participate in on-call support and major incident management activities.
• Implement infrastructure security best practices and hardening standards.
• Support vulnerability remediation and security compliance activities.
• Maintain accurate infrastructure documentation, SOPs, technical diagrams, and knowledge base articles.
• Ensure adherence to organizational policies, change management, and operational procedures.
• Support enterprise backup and recovery solutions.
• Participate in disaster recovery testing and business continuity planning.
• Ensure infrastructure recovery objectives and service availability requirements are met.

Skills

Windows Server

RHEL

VMware virtualization

NSX

Dell EMC SAN Storage

Brocade SAN switches

Cisco networking

Level 2/3 support

Troubleshooting

Backup & DR

Education

Bachelor's degree in Computer Science / IT / Engineering

Tools

VMware vSphere

VMware ESXi

vCenter Server

Dell EMC SAN

Brocade SAN

Cisco switches

Job description

We are seeking a highly skilled Infrastructure Engineer with 6+ years of experience in enterprise IT infrastructure management and support. The ideal candidate will possess strong technical expertise in Windows Server administration, Red Hat Enterprise Linux (RHEL), VMware virtualization, VMware NSX, Dell EMC SAN Storage, Brocade SAN switches, and Cisco networking technologies.

The role requires hands-on experience in managing critical infrastructure environments, troubleshooting complex technical issues, and providing Level 2 and Level 3 support for business-critical systems. The successful candidate will play a key role in ensuring the availability, performance, security, and reliability of enterprise infrastructure services.

Key Responsibilities

Infrastructure Administration

• Administer and maintain Windows Server environments, including installation, configuration, patching, upgrades, and troubleshooting.
• Manage and support Red Hat Enterprise Linux (RHEL) servers in production environments.
• Monitor server health, system performance, and capacity utilization.
• Perform infrastructure maintenance, upgrades, and lifecycle management activities.

Virtualization Management

• Manage VMware vSphere infrastructure, including ESXi hosts and vCenter Server.
• Provision, configure, and maintain virtual machines based on business requirements.
• Perform VM migrations, resource optimization, and capacity planning.
• Troubleshoot virtualization-related issues and implement performance improvements.

VMware NSX Administration

• Support and maintain VMware NSX virtual networking and security solutions.
• Configure logical switching, distributed routing, firewall policies, and security groups.
• Troubleshoot network virtualization and connectivity issues.

Storage Administration

• Administer Dell EMC SAN Storage environments.
• Perform storage provisioning, LUN creation, masking, mapping, and capacity planning.
• Monitor storage utilization and performance metrics.
• Support storage optimization, upgrades, and disaster recovery initiatives.

SAN Switch Management

• Administer Brocade SAN switches and Fibre Channel fabrics.
• Configure zoning and troubleshoot SAN connectivity issues.
• Monitor SAN performance and ensure high availability of storage services.

Network Administration

• Manage and support Cisco switching infrastructure.
• Configure VLANs, trunking, port channels, and switch connectivity.
• Troubleshoot network-related incidents and performance issues.
• Support implementation and maintenance of network standards and best practices.

L2/L3 Support & Incident Management

• Provide Level 2 and Level 3 support for infrastructure-related incidents and service requests.
• Act as an escalation point for critical production issues.
• Perform root cause analysis (RCA) and implement preventive solutions.
• Coordinate with vendors, application teams, and technical stakeholders to resolve complex issues.
• Participate in on-call support and major incident management activities.

Security, Compliance & Documentation

• Implement infrastructure security best practices and hardening standards.
• Support vulnerability remediation and security compliance activities.
• Maintain accurate infrastructure documentation, SOPs, technical diagrams, and knowledge base articles.
• Ensure adherence to organizational policies, change management, and operational procedures.

Disaster Recovery & Business Continuity

• Support enterprise backup and recovery solutions.
• Participate in disaster recovery testing and business continuity planning.
• Ensure infrastructure recovery objectives and service availability requirements are met.

Required Technical Skills

Operating Systems

• Microsoft Windows Server 2012/2016/2019/2022
• Red Hat Enterprise Linux (RHEL)

Virtualization

• VMware ESXi
• VMware vSphere
• VMware vCenter
• VMware NSX

Storage

• Dell EMC SAN Storage
• Storage Provisioning
• LUN Management
• SAN Administration

Networking

• Cisco Switches
• VLANs
• Switching Technologies
• TCP/IP
• DNS
• DHCP

SAN Technologies

• Brocade SAN Switches
• Fibre Channel
• Zoning
• Fabric Management

Service Management

• Incident Management
• Problem Management
• Change Management
• Root Cause Analysis (RCA)

Requirements

• Bachelor's Degree in Computer Science, Information Technology, Engineering, or a related discipline.
• Minimum 6 years of hands-on experience in enterprise infrastructure administration and operations.
• Proven experience supporting large-scale production environments.
• Excellent troubleshooting and problem-solving skills.
• Strong communication and stakeholder management abilities.