Here are a few organizations
I have had the great pleasure of working with:

I remember the first time I had to present to a group after the Peggy Klaus training. It was a high profile speech; the most important one I'd ever given. I didn't sleep the night before as my nerves had the best of me. But then I thought, I will come into the room and command attention. As I started to speak, I felt the passion I had for the job come shining through and everything just flowed. Since then, my co-workers have said many wonderful things about my ability to communicate, including 'You really take command in the room when you speak.' 'People stop and really listen when you speak.' 'You make people feel really welcome when you speak.' I will always be thankful for the gift Peggy gave me.
Hal Marz
University Programs, Google Inc.