Volker Schneider was a lecturer of enological chemistry at Geisenheim University (Germany) and founder of the international consulting firm Schneider-Oenologie, which specialized in quality control, product development, and research. He has authored several scientific papers and more than 400 technical articles. Mark Tracey is an emeritus professor of engineering at the University of Hertfordshire (UK) with an applied research interest in new winemaking technologies. He collaborates with Italian producers in experimental winemaking.