Stephen Green

Stephen Green - Director, Machine Learning Research Group

Stephen Green is a Consulting Member of Technical Staff at Oracle Labs in Burlington, Massachusetts, where he is the Principal Investigator of the Information Retrieval and Machine Learning project.

He is the chief architect and implementer of the Minion search engine Search Engine, a high-performance, open source Java search engine incorporating techniques from information retrieval, natural language processing, and knowledge representation.

Research Interests

  • Core relevance algorithms for Information Retrieval systems
  • Applications of Machine Learning to ranking
  • Document similarity and classification
  • Scalable Information Retrieval systems
  • Information extraction from unstructured data


  • PhD, Computer Science 1997, University of Toronto
  • MMath, Computer Science 1992, University of Waterloo
  • BMath, Computer Science 1990, University of Waterloo

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