Research In Motion’s (RIM’s) John Vandermay, former vice president of BlackBerry Enterprise Server (BES), is leaving the Waterloo, Ont.-based company. Mr. Vandermay is joining the Vancouver-based mining software company Gemcom Software International as vice president of product development. Mr. Vandermay, who first assumed his role in April 2010, is the fifth senior executive to leave RIM in the last six months.