George Gkolas

Experience

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  Siemens DIP

  Apr 2003 - Feb 2007

  SW engineer

  Member of ISDN User Part (ISUP) team located in Athens Greece, providing services to Siemens customers’ globally. I was responsible for:• Development and support of applications used for both ISDN and non-ISDN calls.• Define protocols and procedures used to set up, manage and release trunk circuits that carry voice and data over the public switch telephone network. • Advanced knowledge of Common Channel Signalling System No.7 (i.e SS7), the global standard for Telecommunication, issued by International Telecommunication Union (ITU), Telecommunication Standardization Sector (ITU-T). Show less

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  Instructor in a tutorial center

  Oct 2004 - Jun 2007

  Instructor in a tutorial center

  Instructor for the preparation of the European Computer Driving License (ECDL)

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  WIND Hellas

  Feb 2007 - Mar 2008

  Network System Procurment Specialist

  Working for Supply chain & Facilities Management department of WIND Hellas. My work duties was : • Issuance of RFOs (Request for Offers) for the procurement of systems for the core network including their evaluation (in financial terms) in collaboration with WIND’s technical department. There were two different kinds of requests.o Requests based on an already sigh agreements (Release Orders) o Requests based on new offers (Purchase Orders). In this case further evaluation and negotiation regarding the financial term and conditions took place. For both cases the SAP system was used for the issuance of the order. • Evaluation and/or compilation of contracts in collaboration with WIND’s legal department for the fore mentioned procurement of goods.• • Evaluation of Tenders regarding new implementations in the core network Show less

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  Nokia

  Apr 2008 - now

  Works as an Testing Engineer in Flexi NG nodeIntegration & Verification testing in Flexi-NG network element(GGSN/SGW/PGW/SAW-GW network element) Experienced in :• Agile development ,(Scrum Master Role)• automation testing environments, • Robot framework (Python based)• Ixia's E2E testing "CATAPULT" toolWorks as an software Engineer in Flexi ISN (Intelligent Service Node for 2G and 3G networks) node in SW System Design/Integration/Verification.The main duties was: • Overall responsibility of new customer requests participating on all of the implementation phases (Analysis , Design , implementation and verification of the project ).• Responsible for the Charging area. Part of the SW that handle the reporting of the mobile user data towards to billing systems. • Special Knowledge of protocols related to this functionality such as DCCA, DIAMETER, RADIUS• Advance Knowledge to IP technology and LTE networks Show less

  • Development Lead SDAN

    Nov 2018 - now

  • R&D Shared Data Layer Line Manager

    May 2016 - Oct 2018

  • R&D Technical Line Manager

    May 2014 - Apr 2016

  • Senior System Engineer

    Apr 2008 - Apr 2014