RITA Medical Systems Inc. this week has a new vice president of international sales and marketing. John J. Soto comes to RITA after serving as vice president and general manager of operations for Europe, the Middle East and Africa at Computer Motion Inc. of Santa Barbara, Calif. Before his stint at Computer Motion, Soto spent two years as managing director of Europe for Norwalk, Conn.-based Surgical Dynamics, a division of Tyco International's Healthcare Business unit.