Fabjan Kontestabile was born in 1961. After completing his studies in 1984, he started his police career in the Economic Crime Suppression Division of the former Internal Affairs Administration in Nova Gorica, which he headed for some years. In 1999 he became the head of the Service of the Director of Nova Gorica Police Directorate. 

He was awarded a Bronze Police Badge for security services and a Silver Police Shield for long-term development research contributions in the police.