Senior Network Infrastructure Engineer

HCLTech; Singapore; Hybrid; SGD 120,000 - 180,000; Full time

Benefits offered by this job

Hybrid work model

Job summary

HCLTech is seeking a senior network engineer to manage and support enterprise LAN/WAN, wireless, and remote access infrastructures. You will troubleshoot complex issues, perform capacity planning, and ensure high availability while maintaining security standards.

You will collaborate with cross-functional teams, vendors, and customers, document networks, and contribute to continuous improvement with a focus on stakeholder satisfaction. Hybrid work with three onsite days is required.

Qualifications

• 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.

Responsibilities

• Manage, maintain, and support enterprise network infrastructure, ensuring high availability and optimal performance across LAN, WAN, wireless, and remote access environments.
• Monitor network health, analyze performance metrics, and identify opportunities for capacity planning and continuous improvement.
• Troubleshoot and resolve complex network and infrastructure issues while adhering to SLAs.
• Configure, implement, and support routing, switching, DDI, wireless, and network security solutions.
• Administer firewall technologies, VPN solutions, and secure remote access platforms in line with security policies.
• Collaborate with internal teams, vendors, and stakeholders on projects, upgrades, migrations, and transformations.
• Participate in incident, problem, and change management to ensure timely resolution and risk mitigation.
• Develop and maintain technical documentation, network diagrams, procedures, and knowledge base articles.
• Provide technical guidance to junior team members and foster a culture of operational excellence.

Skills

LAN/WAN

Routing & Switching

DDI (DNS DHCP IPAM)

Wireless Networking

Firewall Administration

VPN/Remote Access

Network Security

Capacity Planning

Incident Management

Root Cause Analysis

Cisco

Palo Alto

Fortinet

Aruba

Cisco CCNP/CCIE

Fortinet NSE

Palo Alto PCNSA/PCNSE

Education

Cisco CCNP/CCIE

Fortinet NSE

Palo Alto PCNSA/PCNSE

Tools

Cisco

Palo Alto

Fortinet

Aruba

Job description

• 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

• 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.