Network Engineer/Admin (MNC, Inhouse)

KOS International Limited; Hong Kong; On-site; HKD 420,000 - 660,000; Full time

Job summary

KOS International Limited in Hong Kong seeks a Network Admin/Voice Engineer to support enterprise network and unified communications across APAC. This hands-on role emphasizes troubleshooting, reliability and regional user support.

You will manage CUCM, Cisco equipment, WAN/LAN, VPN, firewall and voice issues, coordinating with regional teams and vendors to ensure uninterrupted connectivity and performance.

Qualifications

• Degree in Information Technology or related discipline, or equivalent experience.
• Hands-on enterprise network support in multi-site environments.
• CCNA or CCNP with CUCM administration experience.

Responsibilities

• Provide day-to-day network admin and technical support across APAC.
• Troubleshoot routing, switching, wireless, VPN, firewall and voice issues.
• Administer CUCM and resolve telephony connectivity problems.
• Install, configure and maintain Cisco networking equipment.
• Support LAN/WAN, circuits, remote access and cloud connectivity.
• Monitor performance and ensure incident resolution and security controls.
• Collaborate with regional users, IT teams and vendors on incidents and changes.
• Maintain network documentation and change-management procedures.
• Participate in upgrades, vulnerability remediation, and after-hours support when needed.

Skills

Strong troubleshooting

English communication

Team coordination

Incident resolution

Education

Degree in Information Technology or Computer Science

Tools

CUCM

Cisco Catalyst/Nexus/Meraki

VPN & firewall administration

Job description

Our client is an international organisation seeking a Network Admin/Voice Engineer to support its enterprise network and unified communications infrastructure across APAC. This is a hands-on role focused on troubleshooting, operational reliability and regional user support.

Responsibilities

• Provide day-to-day network administration and technical support across APAC locations, ensuring reliable connectivity and timely incident resolution.
• Troubleshoot complex routing, switching, wireless, firewall, VPN and voice-related issues, identifying root causes and implementing effective solutions.
• Administer and support Cisco Unified Communications Manager, resolving telephony and call-connectivity issues.
• Install, configure and maintain Cisco enterprise networking equipment and related infrastructure.
• Support LAN/WAN, internet circuits, MPLS, remote access and cloud connectivity.
• Monitor network performance, availability and capacity, proactively addressing issues before they affect business operations.
• Maintain firewall policies, network segmentation and security controls in line with internal standards.
• Work closely with regional users, global IT teams and external vendors on incidents, infrastructure changes and improvement projects.
• Maintain network documentation, configuration records and change-management procedures.
• Participate in firmware upgrades, vulnerability remediation, disaster-recovery testing and after-hours maintenance or incident support when required.

Qualifications

• Degree in Information Technology, Computer Science or a related discipline, or equivalent professional experience.
• At least 3 years of hands-on experience supporting enterprise networks in a multi-site environment.
• CCNA or CCNP certification and hands-on administration and troubleshooting experience with CUCM are mandatory.
• Strong troubleshooting skills across Cisco routing and switching, wireless networks, VPNs, firewalls and IP connectivity.
• Good command of spoken and written English, with the ability to communicate effectively with regional users and global IT colleagues.
• Solid understanding of L2-3 networking, VLANs, OSPF, BGP, STP, HSRP/VRRP, TCP/IP, DNS, DHCP and NAT.
• Experience with Cisco Catalyst, Nexus, Meraki or equivalent enterprise networking platforms.
• Good command of spoken and written English and Chinese (Cantonese/Mandarin).