• Aramark
  • AXA Advisors
  • Bobby Bragan Youth Foundation
  • BOMA (Building Owners and Managers Association)
  • Casella Waste Systems
  • City of Hurst, Texas
  • Cotton Patch Restaurants
  • East Parker County Chamber of Commerce
  • NAPCA-National Association of Pipecoating Applicators
  • Waste Management

Over 100 Toastmasters Clubs including those located in:

  • Florida
  • Massachusetts
  • Rhode Island
  • New Hampshire
  • Toronto, Canada
  • Dallas, Texas
  • Arlington, Texas
  • Fort Worth, Texas

Over 25 Rotary Clubs including those in:

  • Oneonta, New York
  • Boston, Massachusetts
  • Framington, Massachusetts
  • Portland, Maine
  • Arlington, Texas
  • Fort Worth, Texas
  • Orlando, Florida

And many more organizations and companies around the world!


"We thoroughly enjoyed Mack Mercer's presentaion...we found his message both motivational and informative. One moment we were laughing heartily and the next you could hear a pin drop with his poignant illustrations. I would recommend Mack as a presenter to any group."

-W. Allan Weegar, City Manager, City of Hurst, Texas

"I enjoyed Mack's wonderful presentation...his message was informational, informative, and heartening. We especially enjoyed Mack's witty and poignant examples. His use of humor to tie his points together was phenomenal. In short, Mack knocked our socks off. I highly recommend Mack to any group, organization, or event."

-Zane Hilter, Tarrant County Government Complex, Tarrant County,

"Mack showed our managers how they can more effectively lead their coworkers, family and friends. His presentation blew us away!"

-Peter Vanderhoof, Manager of Casella Waste Systems

"Exactly what we were looking for. Your presentation was a perfect balance of humor, motivation and information. I can see why you were in the World Championship of Speaking."

-Merritt B Chastain, Jr., Managing Director and General Counsel, National Association of Pipe Coating Applicators.