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Kostas Mastrotheodoros is a seasoned professional in the telecommunications and retail sectors. Currently serving as a Business Inside Sales Account Manager at Cosmote e-Value since February 2020, Kostas excels in customer account management for Fiber Optics, Mobile Services, Cloud Services, and Internet Provider solutions, fostering strong client relationships. Prior experience includes roles as Assistant to Sales Manager at Linea armadi, focusing on retail and wholesale sales, and as Delicatessen Store Owner at Diary shop, where retail and wholesale operations were managed. Earlier positions at Linea armadi involved assisting in production management and installation tasks. Kostas holds a Diploma from IEK DELTA and a High School Diploma from Nea Xalkidona.