Metamark Genetics has appointed Jerry Williamson as its CEO. He succeeds Ken Weg, who will retain an active role as chairman of Metamark's board of directors. Williamson joined Metamark as chief commercial officer in 2015. Prior to Metamark, Williamson was a partner with Flagship Ventures. He has also served as vice president and general manager for Molecular Devices (part of Danaher), president of global commercial operations of Genetix, and president of Biocore.