Network Operation Engineer

Company : Cognizant

Job Type : Full Time

Hong Kong

Job Description - Network Operation Engineer

Key Responsibilities

Network Monitoring & Operations

Monitor network performance, availability, and alerts using NMS tools.
Troubleshoot and resolve L1/L2 network incidents related to routers, switches, firewalls, and load balancers.
Perform root cause analysis (RCA) for recurring network issues.
Maintain documentation for incidents, changes, configurations, and standard operating procedures.

Network Device Management

Perform configuration, upgrades, and maintenance of:
- Routers (Cisco, Juniper, etc.)
- Switches (Layer 2 & Layer 3)
- Firewalls (Palo Alto, Fortinet, Cisco ASA, Check Point, etc.)
- Load Balancers (F5, Citrix ADC, etc.)

Network Delivery / Implementation Tasks

Execute port activations (port turn-ups) and end-to-end connectivity tests.
Create, modify, and validate firewall rules while following security policies.
Participate in network deployments, migrations, and capacity expansion activities.
Assist in implementing load-balancing policies and traffic routing rules.

Operational Support & Compliance

Work with cross-functional teams to support application rollouts and infra changes.
Ensure all changes follow ITIL processes (Change, Incident, Problem).
Maintain network security and compliance through periodic audits and patching.
Participate in on-call rotation or 24/7 support shifts (as applicable).

Required Skills & Qualifications

Strong understanding of networking protocols: TCP/IP, VLANs, STP, BGP, OSPF, HSRP/VRRP, NAT/PAT, etc.
Hands-on experience with enterprise-grade network hardware.
Experience with firewall management and rule deployment.
Familiarity with load balancer concepts: VIPs, pools, health monitors, SSL offloading.
Good knowledge of troubleshooting tools (Wireshark, traceroute, ping, netstat).
Ability to read network diagrams and understand architecture flows.

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Network Operation Engineer

Job Description - Network Operation Engineer

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