Mario Alejandro Rosato is an electric-electronic and environmental engineer. He is the CEO of Sustainable Technologies srl, an Italian company. A member of the World Scientific Journalists Association (WSJA), he has been in charge of AgroNotizie's column on bioenergy since 2014 and has published over 300 articles in other journals. He has been running an anaerobic digestion laboratory in Italy since 2012, providing consultancy services to biogas plant owners and builders, and also serving as a technical expert in litigation cases about underperforming biogas plants. Since then, he has been providing technical training to hundreds of anaerobic digestion professionals, both in academia and industry, throughout the world. He provides technical training to the World Biogas Association (WBA) associates since 2023. In 2015 he was a member of the technical commission in charge of redacting the Italian norm on the biochemical methane potential (BMP) test protocol, his contribution focused on error propagation analysis and improving accuracy and precision. His first book on anaerobic digestion, Managing Biogas Plants: A Practical Guide, was published by CRC Press in 2017 and has been in BookAuthority's list of the best 100 books of chemical engineering since 2022.