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Tom Dreiner has a diverse work experience in various managerial roles in the facility management and sales industry. Tom is currently serving as the Geschäftsführer (Managing Director) at WISAG Gebäudereinigung Holding GmbH & Co.KG and WISAG DGV Deutsche Gesellschaft für Verkehrsmittelwartung mbH. Previously, they worked as an Externer Berater (External Consultant) at PHOENIX CONTACT and as a Commercial Sales Director at ISS Facility Services Holding GmbH. Prior to that, they held positions as a Bereichsleiter (Department Manager) at OTTO Luft und Klimatechnik, Leiter Services (Head of Services) at Cofely Deutschland GmbH, and Niederlassungsleiter (Branch Manager) at Bilfinger HSG Facility Management AG.

Tom Dreiner attended VWA Berlin from 1997 to 2000, where they obtained a degree in Betriebswirt (VWA) with a field of study in BWL. Prior to this, from 1990 to 1995, they studied Versorgungstechnik at FH Köln and earned a Diplom - Ing. degree.