Dan practiced plastic and reconstructive surgery for 29 years, consulted to the medical technology and biotechnology industries for over 25 years, and founded Oxygenesys, LLC and Galaxea, LLC. He has helped bring wound healing medical device products to market and had a successful exit when Oxygenesys was acquired. He is a former fellow of the American College of Surgeons and has been board certified in General Surgery, Plastic Surgery and Surgery of the Hand. He is an expert in skin biology and wound healing (multiple publications and grants), and an inventor/author on multiple US patents. As staff surgeon at Kaiser Permanente Northwest, he held the roles of Chief of Plastic Surgery, ASC Chief of Staff and Chief Surgical Officer and was awarded as a Distinguished Physician by his colleagues.