New York—Steve Weitzner, former CEO of CMP, on Monday was named chairman-CEO of Ziff Davis Enterprise, a former division of Ziff Davis Media that was acquired in August by private equity company Insight Venture Partners. Weitzner succeeds Sloan Seymour, who will be working with Insight on special projects. Ziff Davis Enterprise’s media properties include Baseline, CIO Insight and eWeek, as well as a database of 4 million IT professionals. Weitzner took the reins at CMP in September 2005 and aggressively pursued a strategy of acquiring niche online and event properties. In November he stepped down as CEO to lead the company’s international business development efforts.