Dennis Wallentin

Rob Bovey, President of Application Professionals, has developed several Excel add-ins shipped by Microsoft. He coauthored the Microsoft Excel 97 Developers Kit and Excel 2007 VBA Programmer’s Reference.

Dennis Wallentin has developed Excel solutions since the 1980s through his firm, XL-Dennis, based in Östersund, Sweden.

Stephen Bullen, coauthor of The Excel 2007 VBA Programmer’s Reference, owns Office Automation, Ltd., based in Essex, Ireland.

John Green owns Execuplan Consulting, a Sydney, Australia-based consultancy specializing in Excel and Access development.