Sharon Callahan

A trusted advisor to senior healthcare executives and a dedicated mentor to colleagues around the world, Sharon Callahan is known for being an agile, entrepreneurial, and global C-suite executive with a proven track record of leading diverse teams through uncertainty to extraordinary results.

Prior to becoming CEO of CDM in April of 2020, Sharon was CEO of TBWA\WorldHealth, a healthcare advertising agency network she founded in 2016 . Under Sharon’s leadership, TBWA\WorldHealth has quadrupled in revenue, grown to 12 offices across the globe, and was named 2019 Agency of the Year by Medical Advertising News. Sharon also serves as Chief Client Officer of Omnicom Health Group, the world’s largest network of healthcare communications companies.

In 2019 the Healthcare Businesswomen’s Association (HBA) recognized Sharon as its Woman of the Year. She has also been honored by the Arthritis Foundation, and has appeared three times on the prestigious PharmaVOICE list of the 100 Most Inspiring People in the Life Sciences Industry. In 2018, Medical Advertising News selected Sharon as it’s Industry Person of the Year.

Sharon is an active board member of several corporate and philanthropic institutions, including: LGBTQ Victory Fund (Chair), HBA Advisory Board, the Medical Advertising Hall of Fame, the Arthritis Foundation, Women Against Alzheimer’s, the American Association of Advertising Agencies (4A’s) Government Relations Committee, and the Coalition for Healthcare Communications.

A frequent speaker on the power of women’s authentic leadership, Sharon co-founded and continues to champion Omniwomen and OpenPride, Omnicom’s employee resource groups, designed to foster the full potential of women and LGBTQ+ people within the company.