Jack Patrick Dorsey is an American Internet entrepreneur, philanthropist, and programmer who is a co-founder and former CEO of Twitter, as well as co-founder, principal executive officer and chairperson of Block, the developer of the Square financial services platform.He is also a co-founder of Blue sky, where he currently sits on the board of directors, with Jay Graber serving as CEO.In 2015, Dorsey said he began his mornings with meditation. In late 2017, Dorsey completed ten days of meditation known as Vipassanā taught by followers of S. N. Goenka.In November 2018, Dorsey went on a birthday Vipassanā meditation trip to Myanmar.