Network Engineer / Team Lead

ONE WORLD INTERNATIONAL SCHOOL PTE. LTD.; Singapore; On-site; SGD 90,000 - 140,000; Full time

Job summary

ONE WORLD INTERNATIONAL SCHOOL PTE. LTD. is seeking a Network Engineer/Team Lead to design, implement, and operate the school’s enterprise network across all Singapore campuses.

You will lead a skilled IT team, ensure security, high availability, and performance, and provide Level 3 support for complex incidents. You will mentor junior engineers, drive change management, document architectures, and collaborate with vendors to keep networks resilient and scalable in a multi-campus education

Qualifications

• Bachelor's degree in computer science, IT, or network engineering.
• 2-4 years of enterprise network engineering or infrastructure support experience.
• Strong hands-on experience with LAN, WAN, SDWAN, VPN, VLAN, routing, switching, QoS, and wireless networking.
• Experience with Cisco, Aruba, Juniper, Fortinet, Palo Alto equipment.
• Knowledge of security technologies: firewalls, NAC, IDS/IPS, VPN, segmentation.
• Familiarity with SolarWinds, PRTG, Nagios, Zabbix monitoring tools.
• Certifications such as CCNA/CCNP, ACP, NSE, PCNSE desirable.
• Excellent analytical, troubleshooting, communication, and leadership skills.

Responsibilities

• Manage complex network incidents, problems, and enhancement requests.
• Identify root causes and recommend permanent solutions.
• Design, implement, configure, and maintain enterprise LAN, WAN, wireless, and data center networks.
• Perform advanced configuration, optimization, and troubleshooting of network devices.
• Lead change requests per change management processes.
• Provide guidance and mentoring to junior network engineers.
• Maintain network diagrams, SOPs, and configuration records.
• Collaborate with vendors on upgrades and lifecycle management.
• Ensure compliance with IT governance, ITSM processes, and SLAs.

Skills

Leadership

Mentoring

Troubleshooting

Analytical thinking

Communication

ITSM knowledge

Change management

Capacity planning

Incident management

Network security

Education

Bachelor's degree in computer science, Information Technology, Network Engineering, or a related field

Tools

SolarWinds

PRTG

Nagios

Zabbix

Veeam Backup & Replication

Microsoft Hyper-V

SAN administration

Job description

The Network Engineer / Team Lead is responsible for the design, implementation, administration, optimization, and support of the organization's enterprise network infrastructure across all Singapore campuses. This role oversees the stability, security, and performance of the network environment while providing Level 3 technical support for complex incidents, problem resolution, and infrastructure changes.

The incumbent leads the implements best practices for network security and availability and drives continuous service improvement initiatives. As a technical lead, the role provides guidance, mentoring, and technical leadership to the IT team, ensuring knowledge sharing, operational excellence, and adherence to established standards and procedures.

Working closely with internal stakeholders, vendors, and service providers, the Network Engineer / Team Lead ensures the delivery of a secure, scalable, resilient, and highly available network infrastructure that supports the organization's operational and business objectives across all campuses.

Key Responsibilities

• Participate in the management, prioritization, analysis, and resolution of complex network incidents, problems, and enhancement requests.
• Proactively identify potential issues, perform root cause analysis, and recommend permanent solutions to improve network stability and service availability.
• Design, implement, configure, and maintain enterprise LAN, WAN, wireless, and data center network infrastructure.
• Perform advanced configuration, optimization, and troubleshooting of enterprise network devices, including routers, switches, firewalls, wireless controllers, NAC, and load balancers.
• Manage IP addressing, DNS, DHCP, NAT, and network services.
• Perform firmware upgrades, configuration backups, and preventive maintenance.
• Lead the implementation of approved Change Requests (CRs) in accordance with change management processes and prepare Problem Management reports following major incidents.
• Resolve complex technical issues that cannot be addressed by Level 1 and Level 2 support teams.
• Develop, implement, and maintain network security policies, standards, and audit plans to ensure compliance with organizational and regulatory requirements.
• Secure network infrastructure through access control, monitoring, segmentation, vulnerability mitigation, and continuous evaluation of security controls.
• Monitor network performance and capacity, identify bottlenecks, and recommend infrastructure improvements to optimize performance and reliability.
• Collaborate with vendors on hardware and software upgrades, testing, evaluation, implementation, and lifecycle management.
• Design, implement, and support enterprise wireless networks using IEEE 802.11a/b/g/n/ac/ax/be standards, including wireless security and RF coverage analysis using heat mapping tools.
• Maintain accurate network diagrams, technical documentation, standard operating procedures (SOPs), and configuration records.
• Provide technical guidance, knowledge sharing, and mentoring to junior network engineers and support staff.
• Design and deliver technical training sessions and user awareness programs related to network services and security best practices.
• Ensure compliance with IT governance, ITSM processes, security standards, and Service Level Agreements (SLAs).
• Knowledge of Microsoft Hyper-V, virtualization technologies, and Storage Area Network (SAN) administration.
• Knowledge of Veeam Backup & Replication, including backup job configuration, scheduling, monitoring, and virtual machine (VM) restoration.

Preferred Qualifications

• Bachelor's degree in computer science, Information Technology, Network Engineering, or a related field.
• 2-4 years of experience in enterprise network engineering or infrastructure support.
• Strong hands-on experience with enterprise networking technologies, including LAN, WAN, SDWAN, VPN, VLAN, routing, switching, QoS, and wireless networking.
• Experience managing enterprise-class network equipment from vendors such as Cisco, Aruba, Juniper, Fortinet, Palo Alto Networks, or equivalent.
• Knowledge of network security technologies, including firewalls, NAC, IDS/IPS, VPN, and network segmentation.
• Experience supporting data center networking, high-availability architectures, clustering, and disaster recovery solutions.
• Familiarity with network monitoring and management tools such as SolarWinds, PRTG, Nagios, Zabbix, or similar platforms.
• Experience with network design, documentation, and capacity planning.
• Professional certifications such as Cisco CCNA/CCNP, Aruba Certified Professional (ACP), Fortinet NSE, Palo Alto PCNSE, or equivalent are highly desirable.
• Excellent analytical, troubleshooting, communication, and leadership skills, with the ability to mentor junior engineers and manage complex technical environments.