NEW YORK: Burson-Marsteller worldwide CEO and president Mark Penn said the recent appointment of longtime President George W. Bush confidante Karen Hughes as vice chair marks the start of an effort by the agency to create a worldwide “bipartisan braintrust.”

Hughes between 2005 and 2007 was the head of public diplomacy at the State Department and prior to that served in the Bush administration as a senior communications counselor. She will be based in Austin and provide strategic counsel to corporate ...