Frank was born and raised in a small town in Israel. He went to school for dentistry, but ended up studying economics and real estate in cooperation with his younger brother. After hearing of the civil war in Chernarus, he and his brother (and their little sister) decided to head there in attempt to monopolize. Needless to say, they had no idea what was to come to Chernarus as the entered the country.
Also, it doesn't really matter, but Frank spent 16 years practicing the Chinese yo-yo. It was a complete waste of time.