Professor, Information Technology at Conestoga College in Kitchener, Ontario. Previously Director of Engineering at Sybase/SAP, responsible for the query processing team for SAP SQL Anywhere. Interests include database systems, query optimization, SQL, software usability, systems analysis, information systems architecture, design of Management Information Systems, interfaces to database systems, database query languages, user models and human-computer interfaces, multidatabase systems, indexing techniques, and information retrieval.