Testimonials We asked 9 experiential experts. Some assessment participants, but also HR management. Why do they work with assessment centers? 9 professionals will answer you straight. Pure. Based on their experience at Quintessence. We are very grateful to them and also proud. For assessment at Quintessence ... it is quite different! All testimonials are given in their native language! bPOST - Sandra Van Mol ALD - Dominique Degreef Black & Decker - Jan Ooms bPOST - Grace Poppe bPOST - Kathy Blondeel GZA - Geert Goossens Mercedes - Vinciane Jorissen Palm - Godelieve Baeyens UZA - Hildegard Hermans