David Miller welcomes you to Cornerstone Executives

Seasoned & emerging leaders alike depend on David  for leadership development, team facilitation, & executive coaching

About David


Experienced - Authentic - Practical

Raised in West Texas, David Miller graduated from Texas Tech University with a degree in Administrative Management. David was married to Jayne Ann Williston of Austin for 40+ years before losing her to cancer. Now, he is married to the former Katherine McKelvy and resides in Horseshoe Bay, Texas.Together they have four children, Tim, Matt, Beth, and Summer and have nine grandchildren.    

David invested 34 years of his career in the medical equipment industry, 14 of those as the owner and operator of a small retail company with three Texas locations.  Then, for the next 20 years he was the CEO of The MED Group, a national business services organization that grew from 27 locations to over 800 upon his leaving to pursue a new calling.   

In 2005, David founded Spirit Ranch, a leadership and team development retreat center in Lubbock, Texas. With the vision to bring others closer to their Creator and the mission to build believers, leaders, and teams, the Spirit Ranch team served over 30,000 guests and clients.  The transformation in people’s lives and, therefore, their organizations and families, has been amazing.  

In 2006, he was elected Mayor of Lubbock and held the office for a 2-year term. David was a member of the Lubbock National Bank Board of Directors for 34 years. He has been privileged to serve on many community boards and committees with the thought of paying back to others.  Through David Miller, LLC doing business as Cornerstone Executives, he continues to pay forward time-tested tenants of leadership through personal coaching, group facilitation, and inspirational public speaking.


The Four Cornerstones (and the Capstone)

Condensing the good ideas and powerful lessons from leadership books, seminars, videos, speeches, mentors, and clients over a lifetime isn't a simple task. Nor is such a task to be taken lightly. So David created The Four Cornerstones of leadership and life which combine his personal experiences with practical and universal applications. The result of applying the 4 C' get to enjoy laying the Capstone, as well. 


If we are known by the company we keep...

...then David Miller is privileged to be in some pretty good company: Tyler Technologies - Texas Tech University - United Supermarkets - Primoris Services Corp. - University of Houston-Downtown - Fisher59 -Leadership Lubbock - Texas Tech Health Sciences Center - Alderson Auto Group - Covenant Health Systems - United Way - City of Lubbock, Texas - First Bank and Trust - Lubbock Christian University Plains Capital Bank - Second Baptist Church

Contact Us

David looks forward to hearing from you via email. Contact him at

Cornerstone Executives

2815 Bay West Blvd, Horseshoe Bay, TX 78657,

(806) 789-5048

Drop us a line!


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