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Onur Demirkilic is an experienced System Administrator with a strong background in IT infrastructure management and support, currently serving at GDI Integrated Facility Services since 2023. Previously, Onur held key positions at Tangerine, Microsoft, and Sisecam, specializing in Microsoft 365, Unified Communications, and Tier 3 support for Fortune 500 clients. Expertise includes designing, managing, and improving various IT systems such as Microsoft Entra ID, Azure AD, Exchange Server, and implementing disaster recovery exercises while addressing cybersecurity vulnerabilities. Onur holds a Bachelor's degree in Computer Engineering from the National Technical University of Ukraine.