Mark Schulz, Ford Motor Co. executive vice president, is going to retire early next year after 30 years of service with the automotive manufacturer.Schulz is responsible for Ford automotive operations outside of North and South America. He joined the world's second-largest automaker, in 1970 as an assembly line worker.Schulz is one of the latest senior executives to leave since the company appointed Alan Mulally, 61, as CEO three months ago. A series of other senior executives including Ford's second-ranking North American executive, the North...