Dr. Rieke is a founding principal of Quaker BioVentures. Previously, he was a principal at PA Early Stage, a family of venture capital funds that invests in early stage life science and information technology companies. Prior to entering the venture capital industry, Dr. Rieke worked with University of Pennsylvania Center for Technology Transfer where he helped create start-up companies based on faculty inventions.

Dr. Rieke holds a B.A. from Colgate University, a Doctor of Medicine from the University of Pennsylvania School of Medicine, and an M.B.A. from the Wharton School of the University of Pennsylvania.

He has served as a board member and observer for a variety of life science companies, including biopharmaceutical, medical device, and healthcare information technology businesses. He is currently a member of the Board of Directors of Neotropix, Inc. and is a board observer of Biolex, Inc. and BioRexis Pharmaceuticals.

Dr. Rieke is involved with a number of community organizations related to health care and venture capital. He currently serves on the Biotechnology and Life Sciences Advisory Committee for Ben Franklin Technology Partners of Southeastern Pennsylvania, he is an advisor to the Life Sciences Greenhouse of Central Pennsylvania, and he is a member of the University of Pennsylvania Medical Alumni Leadership Council. He also serves on the Advisory Board for BIO Venture Forum East and is active with Pennsylvania Bio.