ArcherDx has appointed Steven Kafka as executive chairman of its board of directors. Kafka will replace Kyle Lefkoff, founder and general partner of Boulder Ventures. Lefkoff will remain on the board of ArcherDx. Kafka currently serves as a partner at Third Rock Ventures. Prior to Third Rock Ventures, Kafka served as president and chief operating officer at Foundation Medicine. Prior to Foundation, Kafka held executive roles at several public and private oncology drug discovery and development companies.