"I want to share our experience and satisfaction with kellerconsulting™ for over 15 years. Throughout these years, kellerconsulting and its founder Graden Keller, have been our trusted thought partner and external sounding board for many projects and organizational changes. Graden is valued as a true friend, not only to the staff, but also to the company. Graden has a special way of opening up the hearts and minds of those who are willing to learn. Those who will listen and see are greatly rewarded."

Charles Neely Harper, Air Liquide ∣ Global Director, Smart Manufacturing & Infrastructure ∣ Chief Technologist, Smart Innovation Operations ∣ International Group Fellow ∣ Large Industries World Business Line - Worldwide Industrial Management