Emeritus Prof. of the Agricultural University of Athens (AUA). He graduated from the Animal Science Department of the AUA, and he gor his Ph.D. from the Animal Physiology and Nutrition Depertment of Leeds University in UK. During his PhD he developed a method of administering trace elements to ruminant animals. This method was patented in 1982 in 25 countries. He has been teaching to the AUA since 1984 Ruminants’ Physiology and Nutrition and up to date he has over 165 scientific papers in peer-review journals, and participation in 106 National and Inter. Scientific Conferences. In addition, he is the author of five academic books on ruminants’ physiology & nutrition and as a researcher he tackled with various subjects, such as nutritional evaluation of feeds for ruminants, biological animal husbandry, etc. He managed more than 85 research projects. He was Rector of the AUA in 2004-2010, Head of Nutritional Physiology & Feeding Department at the AUA, the President of the Hellenic Society of Animal Sciences, the VP of the European Association for Animal Production (2008-2020), President of the Hellenic Agricultural Academy (2018-2022), Section editor of the Livestock Science Journal in animal nutrition, and a reviewer in several scientific journals. He has been coordinator and partner of many projects funded by the EU Greek public organizasions and the private sector.