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Holger Isenberg has extensive work experience in various roles and companies. Holger started their career in 1995 as a C++ Software Engineer at Fraunhofer ISST and worked there until 1999. Holger then joined e-Spirit GmbH as a Unix System Administrator from 1999 to 2005. After that, they worked at e-Spirit AG, where they held multiple roles including Systems Administrator from 2005 to 2014, Consultant from 2005 to 2016, and Senior Consultant from 2016 to the present. Holger also has recent experience as a Senior Customer Engineer at Azul since 2016.

Holger Isenberg completed their education at TU Dortmund University, where they obtained a degree in Diplom-Informatik, specializing in computer science with a focus on networks, distributed systems, and electrical engineering. Holger finished their studies in 2005. In addition to their formal education, they also hold certifications in ITIL Foundation from APMG-International, which they obtained in January 2015, and a German Glider Pilot License from Bezirksregierung Münster, which they acquired in July 2005.