Robert Homler, executive vice president and COO of GNC Corp., Pittsburgh, PA, has resigned to accept a position as senior vice president, marketing, at Linens ‘n Things, Inc. Meanwhile, GNC has appointed Alan Schlesinger to executive vice president and chief merchandising officer. Mr. Schlesinger is a veteran of over 35 years in the retail industry, having served in senior level merchandising and marketing positions for several leading national retailers.