Gateway Motorsports Park in Madison, Illinois, is looking to fill up to 100 positions ahead of the 2015 racing season. The 180-acre racing park, which includes a 1.25 mile NASCAR speedway, is hiring announcers for races as well as emergency personnel, groundskeepers and staff for event operations, support, ticketing and public relations. Chris Blair, general manager of the park, said in a statement positions include weekday, evening and weekend hours. "We have a great racing season ahead of us,…