Alexandros 191111

Administered a large-scale enterprise infrastructure of physical and virtual Windows servers across Nutanix, Azure, Hyper-V and VMware. Supported Hyper-V and VMware clusters and disaster recovery simulation exercises, and migrated virtual machines between Hyper-V clusters while maintaining service continuity.

Administered Google Workspace and Microsoft 365, managing Microsoft 365 licenses and supporting a tenant migration project. Used PowerShell to automate Microsoft 365 administration and created Active Directory reports; administered Active Directory synchronization with Google domains via GADS/GAPS and monitored services with Nagios XI.

Worked in a 24x7 operations environment using BMC Remedy tools to perform patching, health checks, and first-line incident resolution. Escalated complex cases to higher support tiers and administered Google Apps domains for external customers when required.

Provided 24x7 first-line network operations support and communicated in English with providers and teams across multiple continents. Performed troubleshooting on Cisco and Juniper routers, handled BGP-related incidents, dispatched faults, and coordinated escalation to service providers.

Restored, imaged and maintained end-user equipment, managed incidents, and supported operational reporting in Microsoft Excel.

Completed an Advanced Vocational Diploma in Networked Computer Systems Administration (Administración de Sistemas Informáticos en Red).

Completed an Upper Secondary certification in Natural and Health Sciences.

ITIL 4 certification completed.

Completed Cisco Networking Academy coursework covering CCNA 1–4 and security topics. Coursework was completed as training and was not an official vendor certification.