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Marina Y. has extensive experience in customer administration and business systems testing, with a current position as a Specialist at Yettel.Bulgaria since September 2022. Prior to this, Marina Y. worked at Cerillion Technologies for a short period and held various roles at Telenor Bulgaria from June 2015 to February 2022, including Specialist customer administration and testing of business systems. Marina Y.'s career began at Cosmo Bulgaria Mobile, where responsibilities included testing functional systems, new products, and managing corporate customer services in roles such as Senior Assistant Corporate Customer Management and Back Office Representative. Educational qualifications include a Master's degree in Business Administration and Management from Vélikoturnovski universitet 'Sv. Sv. Kiril i Metodi', a Bachelor's degree in Business Administration and Management from the University of Plovdiv "Paisii Hilendarski", and a Bachelor's degree in Marketing/Marketing Management from MT&M College of Sofia.