|Battalion:||EFEC Battlegroup 8 (Mechanized)|
|Place of Birth:||Malaga, Spain|
Santiago attended University of Seville, 1983-88 and joined the Guardia Civil upon graduation. He served as a brigade commander 1994-96 in the Western European Union (WEU) administration of Mostar in Bosnia where he was instrumental in rebuilding the local police force. In 1997, he was recruited by the Guardia Civil's counter-terrorism unit, the Unidad Especial de Intervención (UEI) as part of their focus on the growing threat of terrorist action within the European Union by former citizens of Yugoslavia. Santiago has competed in shooting competitions since he was a child and is an expert marksman. He speaks English, German and Italian fluently, as well as his native Spanish, and can make himself understood in most other European languages.
Santiago Arnavisca is an ex-Rainbow operative. His speciality was Assault.