Patrick is Managing Director of Systems Modelling Limited ( His current focus is spreadsheet data analysis and auditing services as well as training and development. He is chair of the European Spreadsheet Risks Interest Group (EuSpRIG), previously 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 the "Spreadsheet Check and Control" book and the developer of the XLTest spreadsheet auditing Excel addin.