Mark Johnson is a Professor of Language Science (CORE) in the Department of Computing at Macquarie University. He is also the Chief AI Scientist, Oracle Digital Assistant at Oracle Corporation, where he develops chatbots and digital assistants. The Oracle Digital Assistant division develops novel deep learning models to power the next generation of Conversational AI using semantic parsing.

Mark Johnson has worked on a wide range of topics in computational linguistics, but his main area of research is natural language understanding, especially syntactic parsing and semantic analysis, and their applications to text and speech processing.