Kaloyan Matev lives and works in Sofia, capital city of Bulgaria. He graduated from the Technical University in Sofia, specialising in motor vehicles. His career is related to the automotive business in Bulgaria. He was a member of the editors' group of the Bulgarian specialized scale modeling magazine 'Club Models' from 1999 to 2003. He specialises in researching the Second World War period. He is the author of three books published in Bulgaria related to motor vehicles and armour during World War II. He has published a number of articles in Bulgarian magazines relating to the history of heavy weapons, motor vehicles and armoured fighting vehicles of the Bulgarian Army.