Senior IT Infrastructure Engineer: Networking & Security

The Career Works Limited; Hong Kong Island; On-site; HKD 600,000 - 820,000; Full time

Job summary

The Career Works Limited represents a large commercial bank seeking an Senior IT infrastructure Specialist to lead daily network operations and security across LAN/WAN, wireless, Internet services, and VPNs. You will design, deploy, and maintain firewall rules, load balancers and NGINX, plus enterprise Wi‑Fi and NAC solutions, collaborating with development teams to ensure robust, secure environments.

Ideal candidates bring 5+ years of networking experience, CCNP/HCIP or equivalent

Qualifications

• Extensive experience in network infrastructure support and operations.
• Hands-on knowledge of firewall configuration and Site-to-Site IPsec VPNs.
• Proven ability to design, deploy and manage enterprise Wi‑Fi, NAC and mobility controllers.
• Experience with load balancers, NGINX and high availability strategies.
• Strong understanding of TCP/IP, OSPF, BGP and EIGRP routing protocols.
• Ability to work with development teams to provision robust environments.

Responsibilities

• Provide daily network operation and maintenance support for LAN/WAN, wireless and Internet services.
• Configure and maintain next-generation firewalls and optimize security policies.
• Deploy and manage enterprise load balancers and NGINX virtual servers.
• Design and manage enterprise Wi‑Fi networks and NAC platforms.
• Collaborate with application teams for development, testing and production readiness.
• Troubleshoot complex network incidents and share knowledge to the team.
• Define network and security policies and baseline standards.

Skills

TCP/IP

OSPF

BGP

EIGRP

Network security

Wi-Fi networks

VPNs

NAC

F5 iRules

Education

Higher Certificate / Diploma in Computer Science

Degree in Information Technology or Computer Science (preferred)

Tools

iMC

LEM

F5

NGINX

Job description

The Career Works Limited represents a large commercial bank seeking an Senior IT infrastructure Specialist to lead daily network operations and security across LAN/WAN, wireless, Internet services, and VPNs. You will design, deploy, and maintain firewall rules, load balancers and NGINX, plus enterprise Wi‑Fi and NAC solutions, collaborating with development teams to ensure robust, secure environments.

Ideal candidates bring 5+ years of networking experience, CCNP/HCIP or equivalent