Judy Jackson is creating a culture of conversation built around people. To understand Judy Jackson's job as global chief talent officer at the global digital agency Wunderman, you have to start with her boss, Mark Read. He was appointed CEO in 2015 after more than 20 years with Wunderman's parent company, the U.K. advertising and public relations giant, WPP Group. "I came back because of our global CEO, Mark Read," says Jackson, who was with Wunderman 15 years earlier as the HR leader for the New York office. "Mark is known for turning companies around. He came...