Dr. Dénes received his D.V.M. degree in 1979 from the Estonian Agricultural Academy, Tartu, and his Ph.D. in 1994 from the Hungarian Academy of Sciences. From 1987 to 1989, he was a special adviser to the Brucellosis Eradication Program in Mongolia. From 1993 to 1994, he was a research fellow at the Phylaxia – Sanofi Veterinary Biological Company, Budapest, Hungary. In 1994, he became a fellow at the Department of Virology of the Central Veterinary Institute, Budapest. In 1996, he was appointed Director of the Institute of Animal Health in Békéscsaba, Hungary. From 2003 to 2006, he was a visiting scientist at the Loma Linda University School of Medicine, California. Between 2005 and 2021, he was the Deputy Director of the Central Veterinary Institute (now the Veterinary Directorate of the National Food Safety Office). He is a member of several organizations, including the Hungarian Society of Zoonoses (Vice President). Dr. Dénes is a reviewer and board member for numerous scientific journals. In 2010, he became a member and doctoral supervisor of Szent István University (currently University of Veterinary Medicine Budapest), PhD School of Veterinary Science, Budapest. In 2014, he received the Doctor Habilitatus title and became an Adjunct Professor at the University of Veterinary Medicine Budapest. Since 2024, he has continued his research and teaching activities in the United States, focusing on developing diagnostic tools to prevent primarily infectious diseases.