Senior Infrastructure Network Engineer

HCL SINGAPORE PTE. LTD.; Singapore; Hybrid; SGD 90,000 - 120,000; Full time

Job summary

HCL Singapore Pte. Ltd. is seeking a seasoned Network Engineer to design, deploy, and sustain enterprise LAN/WAN environments across client locations.

You will troubleshoot complex issues, implement routing, switching, DDI, wireless, and security solutions, and collaborate with internal teams to drive transformation initiatives. The role emphasizes high availability, capacity planning, incident management, and producing clear documentation.

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, or related field.
• 7+ years of experience in network engineering or enterprise network operations.
• Experience with LAN/WAN, routing, switching, and connectivity services.
• Strong knowledge of DDI, wireless, firewall administration, and security concepts.
• Experience with Cisco, Palo Alto, Fortinet, Aruba, and VPN solutions.

Responsibilities

• Manage and support enterprise network infrastructure for high availability and performance.
• Monitor network health, analyse performance, and plan capacity.
• Troubleshoot complex network and infrastructure issues with minimal business impact.
• Configure routing, switching, DDI, wireless, and security solutions.
• Administer firewall, VPN, and secure remote access platforms.
• Collaborate with teams, vendors, and stakeholders on projects, upgrades, migrations, and transformations.
• Participate in incident, problem, and change management processes.
• Develop and maintain network documentation, diagrams, and SOPs.
• Provide guidance to junior staff and foster operational excellence.
• Engage with customers and stakeholders to deliver reliable network services.

Skills

LAN/WAN expertise

Network troubleshooting

Stakeholder management

Documentation

English communication

Education

Bachelor’s degree in CS/IT

Tools

Cisco

Palo Alto

Fortinet

Aruba

VPN/Remote access tools

Job description

Job Responsibilities

• Manage, maintain, and support enterprise network infrastructure, ensuring high availability, reliability, and optimal performance across LAN, WAN, wireless, and remote access environments.
• Monitor network health, analyze performance metrics, and proactively identify opportunities for capacity planning, optimization, and continuous improvement.
• Troubleshoot and resolve complex network, connectivity, and infrastructure issues while minimizing business impact and ensuring adherence to service level agreements (SLAs).
• Configure, implement, and support routing, switching, DDI (DNS, DHCP, IPAM), wireless, and network security solutions.
• Administer and maintain firewall technologies, VPN solutions, and secure remote access platforms in alignment with organizational security policies.
• Collaborate with internal teams, vendors, and stakeholders to support infrastructure projects, system upgrades, migrations, and transformation initiatives.
• Participate in incident, problem, and change management processes, ensuring timely resolution and effective risk mitigation.
• Develop and maintain technical documentation, network diagrams, operational procedures, and knowledge base articles.
• Provide technical guidance and support to junior team members while contributing to a culture of operational excellence and continuous improvement.
• Work closely with customers and business stakeholders to understand requirements and deliver reliable, customer-focused network services.

Job Requirements

• Bachelor’s degree in Computer Science, Information Technology, or a related field.
• Minimum 7 years of experience in network engineering, network operations, infrastructure support, or related network services roles within enterprise environments.
• Hands-on experience managing and supporting enterprise LAN/WAN infrastructure, routing and switching technologies, and network connectivity services.
• Strong knowledge of DDI (DNS, DHCP, and IP Address Management), wireless networking, firewall administration, and network security principles.
• Proven experience with network performance monitoring, capacity planning, incident management, and root cause analysis.
• Experience working with enterprise networking technologies such as Cisco, Palo Alto, Fortinet, Aruba, and VPN/remote access solutions.
• Demonstrated ability to troubleshoot complex network and infrastructure issues in fast-paced, mission-critical environments.
• Strong customer engagement, stakeholder management, and service delivery capabilities.
• Excellent communication and collaboration skills, with the ability to work effectively across cross-functional and geographically distributed teams.
• Experience supporting infrastructure transformation, migration, or modernization projects is highly desirable.
• Professional certifications such as Cisco CCNP/CCIE, Fortinet NSE, or Palo Alto PCNSA/PCNSE are preferred.
• Fluency in the local language is required, with good written and verbal communication skills in English.
• Willingness to work in a hybrid environment with a minimum of three days onsite at the customer location.