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Marcus Griesser has been working at SBB CFF FFS since January 2000, where Marcus currently holds the position of Leiter Konzernsicherheit and Chief Information Security Officer. Marcus was also a Verwaltungsrat at SwissSign Group AG from March 2020 to September 2021, and at SwissSign AG in 2017-2018. Marcus obtained a Diplom from Universität Trier.