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Holger Plett has extensive experience in the IT and security sectors, currently serving as Security Manager Lead and IT Manager at Deutsche Telekom since March 2012. Plett's previous roles include IT-Security Consultant at SEVEN PRINCIPLES AG and IT-Consultant for Deutsche Bank and networker, projektberatung GmbH. Plett's academic background includes a Master of Science in Computer Science from Bonn-Rhein-Sieg University and a Bachelor of Science in Computer Science from the same institution, alongside studies at Dalhousie University and York University. Plett also has teaching experience as a lecturer in mathematics and network security at Hochschule Bonn-Rhein-Sieg.