Tom Walker is departing i2E to join TechColumbus as CEO. Walker, a founding member of i2E, has served the private nonprofit for 14 years. Walker replaces Tim Haynes, who has been serving as interim CEO.

Mark Herzog will step down as executive director of the Virginia Biotechnology Association on June 1. Herzog will serve as senior vice president for corporate and government affairs at Health Diagnostic Laboratory, a Richmond-based company that conducts clinical tests.