Sara Lee Corporation yesterday announced that Timothy S. Ramey has joined the corporation as vice president, investment strategy, and Richard Oberdorf, who most recently was vice president, portfolio management for Sara Lee Corporation, has been appointed vice president, corporate development. Both appointments are effective immediately and Ramey's status as a corporate vice president is subject to approval by Sara Lee's board of directors. Ramey and Oberdorf report to Ann E. Ziegler, senior vice president, corporate development for Sara Lee Corporation.