Glen Roberts entered rifle hunting at a young age under the supervision of his father (1929-2021), an East African colonial farmer and hunter. Before Glen joined the police force in 1990, he was already an experienced long-range shooter and hunter from months spent at his older brother's 125,000-acre pastoral property.After eight years of police work, Glen underwent the grueling selection process to enter the Western Australian Police Force's Elite Counter Terrorism Unit, ultimately qualifying as a sniper. During his nineteen years as a sniper, Glen also independently studied exterior ballistics, optics, and trajectory mapping software, conducting numerous field tests. He owned and operated Precision Shooting Australia from 2009 - 2017, where he trained police and civilians in long-range shooting.