David Groll is the Founder and CEO of Circadiance. Circadiance designs, makes and sells remote patient monitoring and respiratory equipment. Mr. Groll has developed, manufactured and sold medical devices for over 30 years. Circadiance Before starting Circadiance, David held senior management positions in several other medical device companies. David was founder and CEO of Vincent Medical, a company that performs contract manufacturing of medical devices in China, which he then sold in 2002. From 1986 to 1997 David worked for Respironics, where he ran the Patient Interface Group and was responsible for the development of the Respironics PAP masks. He completed his career there as General Manager of Respironics Hong Kong Ltd, where he was responsible for running the Asian factories that manufactures the Respironics masks. Mr. Groll holds a Bachelor of Science Degree in Biomedical Engineering from the University of Texas at Austin and a Master’s Degree in Manufacturing Systems Engineering from the University of Pittsburgh.