Meet Paula Steiner. She will be taking over for Patricia Hemingway Hall, who was the previous CEO of Health Care Service Corp. She is set to lead Chicago’s biggest private company this coming January, a company which is the parent of Blue Cross Blue Shield of Illinois.

Steiner, who is 58 years old, has been with Blue Cross Blue Shield for over 30 years. Today she is HCSC’s executive vice president and chief strategy officer. She also is the chief to external affairs, including government relations and advertising.

The outgoing CEO, Patricia Hall is 62 and was with HCSC for over 23 years, spending the last seven years as CEO. The company offers BC & BS plans in five different states and is the country’s fourth-larges health insurer, having almost 16 million subscribers.

“Given her experience, her tenacity to solve tough issues and her ability to lead people, Pat has been the ideal CEO to navigate this company so successfully through the twists and turns of our industry over the last several years,” Milton Carroll, chairman of Health Care Service, said.