Since 2000, Gregg has been teaching QuickBooks seminars around the country for various groups and is considered to be an expert in the program. He has taught both new users as well as other CPAs, who are themselves considered experts in the software. Gregg is an Advanced certified QuickBooks Pro-Advisor. Annually, Gregg teaches for Intuit, the makers of QuickBooks, during the QuickBooks Accountant Update Tour given around the country. The tours purpose is to teach accountants the new features available in the latest version of QuickBooks. In total, Gregg has taught over 1000 seminars to more than 30,000 students. Presently, Gregg is teaching seminars around the country designed exclusively for nonprofits and contractors.