Don M. Drysdale has presented and lectured for the following organizations:
- Americian Society of Appriasers
- Canadian Insitute of Charter Business Valuators
- National Association of Certified Valuation Analysts
- Instutute of Business Appriasers
- American Institute of Certified Public Accountants
- Arizona Society of Certified Public Accountants
- Utah Association of Certified Public Accountants
- California Society of Certified Public Accountants
- Society of Louisianna Certified Public Accountants
- University of Arizona
- Weber State University
