Kerry Heid
“Joel gave good concrete examples and had a great sense of humor. I would recommend having Dr. Berk back to present this seminar to managers and others requiring this knowledge.”
Attended in 1993
Director of Rates
Indiana Gas
“Joel gave good concrete examples and had a great sense of humor. I would recommend having Dr. Berk back to present this seminar to managers and others requiring this knowledge.”
See all testimonials from: Indiana Gas | Vectren