Vervitas Georgios

Core Network Engineer

 

Personal information

    Nationality: Greek
        Date of birth: 25 July 1984
        Military obligations fulfilment: Yes

Certifications

Work Experience

Core Network Engineer

13/05/2024 – Present

Hellenic Telecommunications Organisation (OTE) S.A., Kifissias Ave. 99, Maroussi, http://www.cosmote.gr

    • Core Network (and Lab instance): Design, Deployment, Configuration, Monitoring, Troubleshooting, Optimization, Upgrade, Migrations, Security and Policy implementation. Equipment handling of Enterprise/Telco grade like: Cisco ASR 9900/9000 series, Cisco Nexus 9000 series, Nokia SR 7750, and Huawei CloudEngine 12800.
    • Vendor and Technology Collaboration.
    • Documentation and Compliance.

Unified Communication & Collaboration Backend Support Engineer (Vendor)

17/09/2018 - 10/05/2024

Mitel/Unify, Irakleiou Ave. 455, Irakleio, +30 2108187936, https://unify.com/en/ & https://mitel.com

    • Troubleshooting/Support (Implementation of change requests/Planning/Update/Upgrade) on Enterprise grade Solutions for Unified Communications. RFC protocol analysis (SIP/SDP/RTP, CSTA, WebRTC, MGCP, Q931, T38, SOAP, BFCP).
    • Lab reproduction for investigation.
    • Linux administration.
    • Network analysis and Communication peripheral systems support (SBC/Proxy, Branches, Media Servers, T1/E1/BRI/PSTN Gateways, ATA, SIP phones, Softphones).
    • RCA (Root Cause Analysis) documents.
    • KB authoring / Documentation updating
    • Jira and Service Now (SNOW) ticket handling

Telecommunication Services Engineer

3/11/2014 – 14/09/2018

Hellenic Telecommunications Organisation (OTE) S.A., Kifissias Ave. 99, Maroussi, http://www.cosmote.gr

Installation and troubleshooting of Telephony/Broadband/IPTV services. Telecommunication network maintenance, expansion and strengthening.

On Telecoms Technical Customer Support Team Leader (Level B)

18/12/2006 - 31/10/2014

Infoassist S.A., Alexandras ave. 128 Athens, +30 2108099500, http://www.infoassist.com.gr

OTE tickets, RMA, CO visits, SI visits, Call & Ticket audit, Reporting, SLA upkeep, shift planning, agent training.

Six-month practice at Microelectronic lab.

1/3/2006 - 31/8/2006

Technological Educational Institute (TEI) of Piraeus

Supervision and maintenance of wired and wireless network, occupation with AWMN network.

Education and training

MSc “Digital Communications & Networks”

Grade 9,70

25/10/ 2016 – 12/02/2018

Thesis: "Development of Neighborhood Co-Operative Security System", Grade 10 (Download PDF)

University of Piraeus

    • Mobile Networks (3G, LTE, LTE-A), Fixed (ADSL, VDSL, Optical): Backbone analysis, Signal transmission protocols & techniques (ΜΙΜΟ, OFDM, Software Defined Networks-SDN), Cell coverage analysis & improvement, MATLAB analysis.
    • Internet of Things (IoT). Programming languages: Python, Java
    • Satellite Communications Systems.
    • Programming languages: Python, Java.

Engineer of Electronic and Computing Systems

Grade 7,6

16/09/2002 - 13/07/2007

Thesis: "Network Security and special applications", Grade 10 (Download PDF)

Technological Educational Institute (TEI) of Piraeus

    • Network engineering.
    • Telecommunication means and signal transmission techniques.
    • Implementation of software applications using Visual Basic, C, C++, or FORTRAN.
    • Implementation of microcontroller-based integrated systems (embedded systems) and programming with assembly, VLSI and VHDL.

Seminars

    • Time & Stress Management (Infoassist S.A.), 15/07/2010
    • Time & Stress Management (Business-Seminars), 28/11/2008
    • EXECUTIVE LEADERSHIP COURSE (eutrain), 05/2008

Languages

    • English, Proficiency (LRN Level 3 Certificate)
    • Greek (mother tongue)

Additional information

    • Two scholarships (on the first and second year of TEI studies) of TEI.
    • Constitutive letters from OTE, Infoassist, and English course of TEI.