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Mark Kerstjens has a wealth of experience in various account management and sales roles, with a background in consultative selling. Mark has held positions at companies such as GHX Europe, Europrovyl bv, Saint-Gobain Ecophon BV, Isolectra, and KPN. Mark has a diverse educational background from Haagse Hogeschool Den Haag, de buytelaar, and rossdorf.