A selection of testimonials from businesses who have engaged Dennis to speak
- Shell Petroleum
- Barry Plant Doherty Real Estate - Rowville
- Methven Real Estate
- Philip Webb Real Estate Pty Ltd
- Bell Real Estate - Belgrave
- Noel Jones Real Estate
- Lube Mobile
- Avon Cosmetics
- Le Rêve Cosmetics
- Keystone Media
- The Antique Linen Company
- Eastern Access Community Health
- LDS Womens Conference
- Lilydale Chamber of Commerce
- Rotary Club of Hampton
- Belgrave View Club
- Kooyong U3A Speakers' Corner Group
