He is promoted from his role of president and chief operating officer of the eastern region of Weber Shandwick, part of the Interpublic Group of Companies.
Polansky will now oversee Weber Shandwick's offices in the US and Canada.
There has been some turmoil in the upper ranks of Weber Shandwick after it merged with rival PR agency BSMG when Interpublic bought the True North marketing services group.
In February this year, Barbara Molotsky, president and chief operating officer of Weber Shandwick's central region in the US, resigned only four months after being named to the role.
Polansky has since been overseeing her patch, which includes offices in Chicago and Dallas.
Harris Diamond, CEO of Weber Shandwick, said: "This expanded role reflects Andy's many accomplishments during the 19 years he has been with our company."
The agency has also promoted Gail Heiman to be president of Weber Shandwick's New York office. She will continue in her role of co-president of the consumer marketing practice.
Weber Shandwick has more than 3,000 employees and is ranked as the largest PR agency in the world.
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This article was first published on brandrepublic.com