Deloitte Touche Tohmatsu Limited announced Chicago-based Robert T. O¿Brien has been appointed to lead its global real estate group. O¿Brien, a vice chairman with Deloitte in the U.S., will also continue as the U.S. real estate leader. O¿Brien joined the Deloitte U.S. firm in 1983 upon graduation from John Carroll University with bachelor's of science in accounting. In 1989, he earned a MBA in finance from Northwestern's Kellogg Graduate School of Management, with a concentration in real estate and international business. He is a CPA.