Share In February, the Division of Biology and Biological Engineering (BBE) welcomed David Warren as its new division operations officer (DOO), charged with overseeing space planning, human resources, logistics, grants and finance, compliance, and other crucial administrative functions of the division. Warren, who now oversees a staff of about 30 people who support 50 faculty researchers, assumed a position that was previously held by Mike Miranda, who is stepping down after 48 years of service at Caltech and 21 years as BBE’s division administrator/division operations officer. Miranda will stay on in a support role for the next several weeks to assist in the transition.