Looking for a job

hada roselserrano

@hadaroselserrano

Network Operations Technician with Telefónica experience troubleshooting routing, switching, VoIP, and firewall incidents in a 24/7 NOC.

Spain

Message

At Telefónica, I monitored network infrastructure in a 24/7 NOC and diagnosed connectivity incidents involving routing, switching, VoIP, and firewalls. I analyzed router and switch configurations to identify network issues and apply corrective measures.

I tracked and escalated incidents using ServiceNow, Jira, and Remedy, helping support service availability and continuity. At Antiun, I installed and configured operating systems, maintained and repaired computers, and prepared storage devices.

Experience

Work history, roles, and key accomplishments

Técnica de Operaciones de Red (NOC)

Telefónica

Jan 2025 - Jan 2026 (1 year)

Operated and monitored network infrastructures in a 24/7 NOC environment with rotating shifts. Diagnosed and resolved connectivity incidents through troubleshooting of routing, switching, VoIP, and firewalls.

NOC Routing Switching TCP IP VoIP Firewalls ServiceNow Jira Remedy Cisco Nokia Huawei Fortinet Teldat

Técnica informática

Antiun

Mar 2024 - Jun 2024 (3 months)

Installed and configured operating systems. Performed maintenance and repair of computer equipment, and prepared, formatted, and labeled storage devices.

Operating System Hardware Maintenance Data Storage