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Holger Petrick has a diverse work experience starting from being an Information Technology Specialist at Nashuatec in 2003. Holger then worked as a Server Administrator at AMB - Associação Menonita Beneficente, Brasilien from 2004 to 2008. Following this, they joined ExxonMobil and served as a Client Support Specialist and subsequently as a Windows Server Administrator from 2008 to 2013. Afterwards, they joined Jindal Films and held various positions including Senior Windows Servers Engineer, Team Lead Server Operation, and finally, Head of IT Infrastructure / Senior Servers Engineer from 2014 to 2018. Most recently, they worked at SPIRIT/21 GmbH as a Senior System Administrator and is currently working as a Team Lead starting from July 2022.

Holger Petrick attended BBS4 Hannover / NRG (Ricoh), Hannover from 1999 to 2003, where they studied Computer/Information Technology Administration and Management. In terms of certifications, they obtained the Microsoft Certified Professional (MCP) certification in 2008, followed by the Windows Server 2008, Server Administrator (MCITP) certification in the same year. In 2012, they achieved the certification of Automating Administration with Windows PowerShell from Microsoft. Additionally, they hold a Microsoft Certified Technology Specialist (MCTS) certification, although the specific year of attainment is not provided.