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John Vandermay, formerly vice president of BlackBerry Enterprise Server (BES) software at Research In Motion Ltd., has opted to leave the Waterloo, Ont.-based company.

On Tuesday afternoon, Gemcom Software International Inc. announced Mr. Vandermay was joining the Vancouver-based mining software company 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.

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RIM’s chief marketing officer

in March for personal reasons. Mr. Pardy was hired in 2009 as the first ever BlackBerry marketing chief and his duties were folded into those of co-chief executive Jim Balsillie in early May.

In mid-June, chief operations officer Don Morrison went on medical leave after more than a decade with RIM. The company confirmed Mr. Morrison would not be coming back five weeks later.