Mobile data system provider Digital Dispatch has strengthened its sales team with the addition of Brent Gushulak as VP of sales for North America, and James Hutton as VP of business development. Gushulak, who has more than 20 years experience most recently serving with Sub Microsystems of Canada Inc., will lead the company's sales efforts in the North American taxi, transit, roadside assistance and other new markets. Hutton will focus on securing new ventures and strategic business alliances with a specific focus on in-vehicle advertising. He was most recently president of Voice Mobility Inc.