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CHICAGO – The Executives’ Club of Chicago, the city’s premier membership organization for business executives, welcomes Dean M. Harrison as its new Chair of the Board of Directors. Harrison is the President and Chief Executive Officer of Northwestern Memorial HealthCare. Harrison will replace Tonise Paul, Chairman of Energy BBDO, who has served as The Executives’ Club Board Chair since 2018.

“I would like to thank Tonise Paul for her contributions and partnership as outgoing Chair of our Executive Board Committee,” said Margaret Mueller, President and CEO of The Executives’ Club of Chicago. “I welcome Dean M. Harrison as an influential civic leader and champion of change. We look forward to his leadership as The Club enters its 110th year.”

“I am honored to be named Chair of the Board of Directors for such a respected organization,” said Dean M. Harrison, President and Chief Executive Officer, Northwestern Memorial HealthCare. “I look forward to continuing the Club’s longstanding history of professional development and providing opportunities to enrich business relationships.”

Since joining Northwestern Memorial HealthCare in 1998, Harrison has been instrumental to the creation and success of Northwestern Medicine, now an integrated academic health system anchored by Northwestern Memorial Hospital and Northwestern Medical Group. Northwestern Medicine comprises 10 hospitals, over 200 ambulatory and diagnostic sites, and more than 4,800 physicians.

Harrison also serves on the boards of directors of the Center for Medical Interoperability, Illinois Hospital Association, Navy Pier, Northern Trust, Northwestern University, Ravinia, and World Business Chicago. He is a member of the Commercial Club of Chicago, its Civic Committee, the Economic Club, and the Institute of Medicine of Chicago.

About The Executives’ Club of Chicago:

The Executives’ Club of Chicago is the city’s premier membership organization and resource for senior executive leadership, development and growing best-in-class leaders to strengthen themselves and their organization. For more information on the Executives’ Club, visit