Patrick O'Beirne has been managing director of Systems Modelling Limited since 1981. His current focus is spreadsheet systems modeling and auditing services as well as IT consultancy. He is current chair of the European Spreadsheet Risks Interest Group (EuSpRIG) and of SoftTest Ireland, and a fellow of the Irish Computer Society. He advised the ECDL Foundation on the content of a syllabus for a new certification in good spreadsheet practices. His latest book isSpreadsheet Check and Control (Systems Publishing, 2005, ISBN 190540400X). He was an expert advisor to the European Commission during the first euro currency conversion of 12 member states. He provided presentations and tutorials internationally, changeover consulting, and compliance auditing. He is an approved software tester to the BASDA standard for EMU compliance, and contributed advice and converter testing services to the national Euro Business Awareness Campaign of Ireland. His book Managing the Euro in Information Systems; Strategies for Successful Changeover was published by Addison Wesley in August 1999 (ISBN 0201604825). His long career spans many facets of software systems development, testing, and training. He is a director of the Informatics Development Institute, which managed the TRINET FP5 project to provide remote regions with access to the worldwide Internet via low-earth-orbiting satellites. During the Year 2000(Y2K) project wave, he wrote many articles, spoke internationally, consulted, and audited projects. Prior to that he gained a certification as a TickIT ISO9000 auditor, and he promoted software development process improvement using the Personal Software Process. He lectured on Quantitative Methods and IT training in the Irish Management Institute, and in computer applications at the Management Science School of the Department of Statistics in Trinity College Dublin. Prior to setting up Systems Modelling Ltd, he worked as a business analyst in Operations Research for Irish Fertiliser Industries, applying linear programming for production optimization and project financial modeling. His interest is in practical, effective solutions to systems problems, with a focus on the real objectives to be attained. Project references are available on request. He can be reached at http://www.sysmod.com.