"We designed, wrote and recorded several lessons at the SHSU on-line recording studios. . . the work Dr. Castle did with me and our team demonstrated his deep knowledge of leadership and management issues and his ability to develop meaningful course work." -Executive Director of On-Line Learning, Sam Houston State University (SHSU)

"I have admired, and envied, JD’s ability to articulate his thoughts in such a way that allows everyone to quickly understand his meanings. JD has the ability to make a person feel at ease and want to interact in conversation. JD always manages to create positive discussions and bring the best ideas and thoughts out of others." -Sr. Vice President, Woodforest Financial Services