Patrick is Managing Director of Systems Modelling Limited ( since 1981. His current focus is spreadsheet systems modelling and auditing services as well as training and development. He is occasional chair of the European Spreadsheet Risks Interest Group (EuSpRIG), a committee member of SoftTest Ireland, and a Fellow of the Irish Computer Society. He has advised two certification bodies on the content of a syllabus for a new certification in good spreadsheet practices. He is the author of “Spreadsheet Check and Control” (Systems Publishing, 2005, ISBN 190540400X) and the developer of the XLTest spreadsheet auditing Excel addin.