For 25 years, John Sweeney has been changing human behavior as a Keynote Speaker within the biggest businesses in the world, including Microsoft, Target, Hilton, United Health Group, General Mills, Facebook, Apple, and Bank First. He has shared the stage with George Bush, Sr., Deepak Chopra, Betty White, Steve Ballmer, and Mark Zuckerberg. 

Sweeney has written four books. A quote from Sweeney, taken from the book Innovation at the Speed of Laughter: 8 Secrets to World Class Idea Generation, appeared as cup quote #183 in Starbucks "The Way I See It Program.".[1] The quote read: "Improvisers don't look at change as an obstacle; we look at it as fuel. we know that the next great idea lies just on the other side of the change. We are constantly asking ourselves, 'What can I do to incite change?' Well?"

John Sweeney is well known for his MN Timberwolves superfan character, deemed "Jiggly Boy," which was a stunt that went viral and garnered over 500 million views as well as pickup in all major US sports media. His website Jigglyboy.com has funded hundreds of surgeries for children through Smile Network, International.