Stephanie Snyder, vice president of marketing and communications at Gulfstream Aerospace, resigned unexpectedly last month. She had been with the Savannah, Ga. manufacturer for more than six years. Snyder also served as an executive assistant to former Gulfstream president Bill Boisture, who left the company abruptly in April, to be replaced by then vice chairman Bryan Moss (AIN, May, page 1). An official reason for her departure was not available at press time from Gulfstream. Snyder did not return telephone calls seeking comment.