CEO, Weber Shandwick; CEO, Interpublic's Constituency Management Group

Harris Diamond had a year of highs and lows, ranging from giving up a high-profile new account due to client conflict, to suing a rival network PR agency, to posting impressive growth across the PR and events firms he oversees as CEO of Interpublic's Constituency Management Group. The division's biggest agency, Weber Shandwick, is one of three firms racing to be first to hit $1 billion in revenues.

One chastening blow ...