The board of directors of Overstock.com Inc., a Salt Lake City-based online retailer, has appointed Robert Shapiro to the board. Shapiro replaces Kamelia Aryafar, who has resigned from her seat on the board and her executive role with the company. Aryafar’s executive duties have been absorbed by other members of Overstock’s leadership. Shapiro is the chairman and founder of Sonecon LLC, a firm advising businesses, governments and nonprofit organizations on economic and security-related matters. He also is a member of the boards of directors of Medici Ventures, Overstock’s wholly owned blockchain accelerator, and Medici Land Governance.