Both as a practitioner and a thinker, David Armstrong has, for many years, been a leading figure internationally in the fields of organizational consultancy and group relations. In papers presented at a wide range of gatherings -- in North America, Israel, Australia and Bulgaria, as well as in mainland Europe and the United Kingdom -- he has produced a body of work in which he explores the practical application of psychoanalytic thinking in organizational contexts. He is particularly well-known for his innovative interpretations of the ideas of Wilfred Bion.