Sightings of a man with a vacuum strapped to his back riding a bicycle around the University of Colorado at Â鶹ӰԺ campus will not turn up a "ghostbuster," but rather a "roachbuster." Scott Harvey, who works in CU-Â鶹ӰԺ’s Facilities Management department, is the campus pest management technician. But he also is known as the campus "bugbuster," "roachman" and "antman." Harvey, who has been hunting roaches and other pests for more than 10 years, uses a technique called Integrated Pest Management, or IPM, to combat the universityÂ’s unwelcome guests.