When Jeff Corbin was hired in June 2016 as the director of maintenance and fleet operations at Mahoney Environmental, the company’s senior-leadership team gave him a mission: Develop a first-class fleet of trucks. Based in Joliet, Illinois, Mahoney Environmental collects millions of gallons of cooking oil a year at restaurants and other businesses nationwide and processes it, primarily for conversion into biodiesel fuel.Since then, Corbin has done just that by purchasing 17 new eco-friendly, low-emission Freightliner tractor cabs (2017 and 2018 models) that run on biodiesel fuel and eight new vacuum tanker trailers built by Advance Pump & Equipment. The















