Meet Your Expert
Dennis is the author of Teach Yourself Microsoft Excel 2000 and a co-author of four other books on spreadsheet software.
He has developed customized Excel courses for specific clients, and has recorded over 180 hours of Excel training courses for Lynda.com.
Since 2006 he has presented over 600 public webinars on a variety of Excel topics. Dennis has taught over 5,000 seminars and classes and has led numerous training sessions with Apple, IBM, Lexmark, Texaco, Raytheon, Northrop-Grumman, and various federal and state agencies.