Senior Network Security Engineer – Banking & Data Center

Nityo Infotech; Hong Kong; On-site; HKD 700,000 - 1,100,000; Full time

Job summary

Nityo Infotech is seeking an experienced professional for L3 network security operations in Hong Kong. The role requires a strong hands-on background in advanced security operations, with a focus on banking/regulatory environments and high-availability systems.

The candidate will troubleshoot complex, multi-domain issues, coordinate with engineers and vendors, and ensure robust incident/change management practices in production networks.

Qualifications

• 5+ years hands-on L3 network security operations
• 8-10 years total experience
• Strong hands-on experience with Cisco Data Center technologies (including ACI)
• Proven ability to troubleshoot complex, multi-domain issues under pressure in a customer‑facing environment
• Proven support experience in banking, financial services, or regulated environments
• Good knowledge of ITIL Incident, Problem, and Change Management
• Excellent troubleshooting skills in high-availability, mission-critical systems
• Clear communication with engineers, vendors, and stakeholders

Skills

L3 network security operations

Troubleshooting under pressure

Banking/regulatory environments

ITIL Incident/Problem/Change

High availability systems

Vendor/engineer communication

Tools

Cisco Data Center technologies (ACI)

FortiGate/FortiManager/FortiAnalyzer

H3C / Arista switches

Catalyst and Nexus switching

Job description

Nityo Infotech is seeking an experienced professional for L3 network security operations in Hong Kong. The role requires a strong hands-on background in advanced security operations, with a focus on banking/regulatory environments and high-availability systems.

The candidate will troubleshoot complex, multi-domain issues, coordinate with engineers and vendors, and ensure robust incident/change management practices in production networks.