Stelios Kostakis has extensive experience in the telecommunications and IT sectors, beginning as an IT Support Specialist at CNET O.E IT support from June 2014 to May 2016, where responsibilities included ERP installation, PBX support, and network services. From June 2016 to November 2019, Stelios served as a Unified Communications Engineer and MIPT Tier 2 Specialist at AT&T, providing advanced technical support for various Cisco products. Since November 2019, Stelios has been a Senior Voice Engineer at Mitel, focusing on troubleshooting VoIP/IP-PBX issues, maintaining service levels across regions, and coordinating with partners and internal teams to resolve technical problems. Stelios holds a Bachelor’s Degree in Business Plan and Information Systems from the Technological Education Institute of Patra, completed between 2004 and 2009.
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