Dennis Taylor has over 25 years of experience working with spreadsheet programs as an author, speaker, seminar leader, and facilitator. Since the mid-90’s, he has been the author/presenter of numerous Excel video and online courses and has travelled throughout the US and Canada presenting hundreds of seminars and classes.

He has authored or co-authored multiple books on spreadsheet software and has presented over 500 Excel webinars to a diversity of audiences. Dennis has worked with hundreds of different corporations and governmental agencies as well as colleges and universities. He lives in Boulder, Colorado.