Dan Callahan currently serves as Board Chair for Healing Cancer Journeys in a volunteer capacity since August 2025. At ZoomRx, Dan holds the position of Principal Brand Builder, starting in January 2024. Previously, Dan was the Founder and CEO of Vivisum Partners, LLC from May 2011 to January 2024, and served as Vice President at Escalent from March 2008 to April 2011. Earlier in Dan's career, positions included Research Director at The Link Group (February 2002 - March 2008) and Associate at Best Practices, LLC (January 2000 - September 2001). Dan graduated from the University of North Carolina at Chapel Hill in 2001.
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