About Us

Lean is more than just a buzzword; it’s a way of life!

Position: President & CEO
Years of experience: 20
Nashville, Tennessee Area

Mr. Donnerstag has a passion for helping people and from that passion LeanSet was born. His other passion is learning.  David holds a Master’s in Business Administration and compliments this with a technical B.S. in Industrial Engineering, and an AAS in Human Resources and Aviation Technology.

Throughout his career, he led both large and small organizations. David’s success is a culmination of 20+ years practical leadership experience, continued education and his dedication to our most valuable resources, people. He believes a key component to success is remaining current in emerging technologies, business system applications, and Lean coaching.

Our Vision

LeanSet will disrupt the business consulting market by offering to our customers STRATEGIC, SIMPLE and SUSTAINABLE solutions at a competitive price.

Our Mission

To tangibly improve our customer’s performance in a strategic, simple and sustainable manner.

Supporting Vision Elements

Our Vision will be achieved through carefully hand-selecting personalized business solutions meeting each customer’s individual needs; not a “one size fits all” approach.

​Our desire is to offer innovative solutions which are STRATEGIC, SIMPLE, customizable, scalable, SUSTAINABLE, and transparent throughout the entire organization.

Marketplace Perspective

  • We believe coaching is a business driven by professionals who are dedicated to serving others.
  • We believe the business coach must be honest, flexible, personable, and dedicated to serving the customer’s needs.
  • We believe our coaches must be thought leaders.
  • We believe our growth will come by serving our customers with Honesty, Humbleness, and Respect
  • We believe in practicing what we preach!

Our Clients

Testimonials