© 2016, American Institute of Mathematical Sciences. All rights reserved.John Moore was born in 1941 and died in 2013. The bulk of his professional career was spent as a researcher, with about half at the Australian National University from which he retired in 2006. His interests flowed through many aspects of control systems, signal processing and communications, with occasional forays a little further afield. His central area of interest was control, and he made many contributions across different subfields, especially in linear optimal control, adaptive control and identification, and general optimization for dynamic systems. He collaborated widely, within and outside Australia (including lengthy stays in Japan, Germany, UK, Singapore and USA), managing to write textbooks in control and aspects of signal processing with local and foreign authors. His contributions were honoured through election as an IEEE Fellow, and as a Fellow of the Australian Academy of Science and the Australian Academy of Technological Sciences and Engineering. He was awarded a Centennial Medal by the Australian Government in 2001.