Simon spoke at the inaugural Excel User Conference in Dallas Fort Worth in 2005, and regularly speaks and contributes to the European Spreadsheet Risk Interest Group (eusprig.org), the worldwide authority on the risks inherent in commercial spreadsheet use.

XLAnalyst, the spreadsheet risk assessment tool that Simon developed is one of the most popular spreadsheet audit tools in the market.

Simon is also a member of the Microsoft Office Developer Advisory Council, and helped steer the developer features of Excel 2010. He has an MSc in Software development and his main consulting interest is around performant User Defined Functions