We shift individuals and organizations from functioning well to performing optimally! 

Our mission is to help our clients master their performance.

About the CEO


Mr. Donnerstag has a passion for helping people improve, and from that passion LeanSet was born. Continuous learning and personal and professional improvement are vital to serving and exceeding our client’s expectations. David holds a Master’s in Business Administration and compliments this with a B.S. in Industrial Engineering and an AAS in Human Resources and Aviation Technology. David also maintains professional coaching certifications from the International Coaching Federation (ICF) and Professional Excellence in Coaching (iPEC)

Throughout his career, he has led large and small organizations. David’s success culminates with 25+ years of practical leadership experience, continued education, and dedication to our most valuable resources: people. He believes that remaining current in emerging social and technological changes is crucial to success.