Coaching with conflicting philosophies
The situation: You're assisting with a struggling high school volleyball program. The head coach has been there for 30 years with varying levels of success over the years. The full-time JV/Freshman coaches have minimal coaching or volleyball experience and follow the head coach's philosophy and teaching methodology verbatim.
Your background: You've been coaching for under 10 years, but have been working with perennial state championship contending high school programs, top ranked collegiate programs, and international coaching staffs. Your philosophies on how to teach the game from the ground up, as well as general theory, have been built upon a foundation of winning.
The question: How does one go about subtly changing the way things are run for the betterment of the struggling program?