The Ambassadors of Harmony (AOH) is a 120+ member men's barbershop chorus, based in St. Charles, Missouri. The chorus won International Championship gold medals in 2004, 2009, and 2012 – each time singing two arrangements by David Wright, under the direction of Dr. Jim Henry – and then again in 2016 and 2023, under the co-direction of Jonny Moroni and Dr. Henry. Their 2009 victory broke a nearly three-decade winning streak by the Vocal Majority.

David Lee Wright is a mathematics professor, barbershop arranger, and Associate Director of the Ambassadors of Harmony (AOH). He is a noted a cappella historian and arranger, especially in the barbershop style where in 12 of 18 years from 1999 to 2016, his arrangements resulted in chorus gold medals at the Barbershop Harmony Society (BHS) International Contest. Wright travels the world as a barbershop historian, coach, and mathematics lecturer.