Irvine-based Specific Media, an online advertising network, revealed Tuesday that it has hired Jon Schulz as the firm's Senior Vice President, Global Category Development. Schulz was most recently at Ford Motor Company, where he headed the auto maker's digital and direct marketing. According to Specific Media, Schulz headed up Ford's digital media, brand websites, emerging media, dealer lead management and CRM efforts. Specific Media is one of the largest online advertising networks, and provides targeted advertising to its customers.