Sr Engineer, Networks

Title: Sr Engineer, Networks

Job Summary

The Network Engineer / Team Lead is accountable for the design, implementation, administration, optimization, and ongoing support of the organization’s enterprise network infrastructure across all Singapore campuses. This position ensures the network environment remains stable, secure, and high-performing, while delivering Level 3 technical support for complex incidents, problem solving, and infrastructure change activities.

In this role, the incumbent leads the adoption of proven network security and availability practices, and drives continuous service improvement initiatives. As a technical lead, the role provides direction, mentorship, and technical leadership to the IT team—supporting knowledge sharing, operational excellence, and compliance with established standards and procedures.

Working 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 aligns with the organization’s operational and business goals across all campuses.

Key Responsibilities

• Contribute to the management, prioritization, analysis, and resolution of complex network incidents, problems, and enhancement requests.
• Proactively detect potential issues, conduct root cause analysis, and propose lasting solutions to strengthen network stability and service availability.
• Design, implement, configure, and maintain enterprise LAN, WAN, wireless, and data center network infrastructure.
• Carry out 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 other network services.
• Perform firmware upgrades, configuration backups, and preventive maintenance.
• Lead the implementation of approved Change Requests (CRs) in line with change management practices, and prepare Problem Management reports after major incidents.
• Resolve complex technical issues that are beyond the scope of Level 1 and Level 2 support teams.
• Create, implement, and maintain network security policies, standards, and audit plans to ensure compliance with organizational and regulatory requirements.
• Protect the network infrastructure through access control, monitoring, segmentation, vulnerability mitigation, and ongoing assessment of security controls.
• Monitor network performance and capacity, uncover bottlenecks, and recommend infrastructure enhancements to improve performance and reliability.
• Partner with vendors on hardware and software upgrades, including testing, evaluation, implementation, and lifecycle management.
• Design, implement, and support enterprise wireless networks based on IEEE 802.11a/b/g/n/ac/ax/be standards, including wireless security and RF coverage assessment using heat mapping tools.
• Maintain precise network diagrams, technical documentation, standard operating procedures (SOPs), and configuration records.
• Provide technical support, knowledge sharing, and mentorship to junior network engineers and support personnel.
• Design and deliver technical training sessions and user awareness programs focused on network services and network/security best practices.
• Ensure alignment 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.

Minimum Qualifications

• Bachelor's degree in computer science, Information Technology, Network Engineering, or a related field.
• Certification / Diploma in Network Technology and Cyber Security

Experience

• 5-10 years of experience in enterprise network engineering or infrastructure support.
• Experience in Education sector will be preferred.
• 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.
• Basic windows server and Mac troubleshooting
• Professional certifications such as ENCORE, Cisco CCNA/CCNP, Aruba Certified Professional (ACP), Fortinet NSE, Palo Alto PCNSE, or equivalent are highly desirable, JamF Pro & Protect, PMP , AI .
• Excellent analytical, troubleshooting, communication, and leadership skills, with the ability to mentor junior engineers and manage complex technical environments.

Working Days:

• On-Site
• 5.5 Working Days