One of the best ways to learn about Jack is to read his posts. Here are a couple early ones:
Trainer, Speaker or Actor? Why Not Acting in Business? In Training?
and If I Am An Actor Why Am I Here?
Jack has extensive experience in training and his diverse background in speech, acting, psychology as well as performance criticism brings a broad, yet deep, perspective on training that we all can learn from. Often, he picks an angle from different perspectives–the employer, the employee being trained and the trainer.