Marihart attended the Bundesgymnasium Horn , where he graduated in 1969. He then began his studies in Technical Chemistry , Biotechnology at the Technical University of Vienna, where he graduated in 1975 with the degree of Diplom-Ingenieur . Marihart began his professional career in the sugar industry in 1975 at the Agrana sugar factory in Leopoldsdorf in the Marchfeld . In 1976 he moved to the factory in Gmünd , where he grew up with laboratory activities and research and development to the works manager. Marihart has been a member of Agrana's Board since 1988 and has been Chairman since 1992. Under his direction, theTrade name Wiener Zucker .In addition to his work at Agrana, Marihart held many other functions in business. He is a member of the Board of Directors of Südzucker AG Mannheim / Ochsenfurt , Chairman of the CEFS (Comitée of European Sugar Producers ) in Brussels, President of the ÖVP - Near Industrial Association of Lower Austria, General Council of the Austrian National Bankand University Council of the University of Natural Resources and Applied Life Sciences . In addition, Marihart is a member of the Supervisory Board in various companies and President of the Supervisory Board of the Spanish Riding School as well as the same position in TÜV Austria .

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