Jack Patrick Dorsey (born November 19, 1976) [3] is an American businessman, co founder of Twitter, Inc. and CEO during 2007–2008 and 2015–2021, as well as co founder, principal executive officer and chairman of Block, Inc. (developer of the Square financial services platform) and founder of Bluesky.

Brian is Block’s Ecosystem Lead, focused on connecting Square, Cash App and the rest of our ecosystem through product experiences. As Square’s first product lead, he helped launch our flagship card reader in 2010.

Jack Dorsey is chairman and block head (effectively CEO) of payments company Block, formerly known as Square.

Jack Dorsey is in reassembly mode at Block, the fintech company that owns the popular payment services Cash App and Square, as well as music streaming service Tidal.

Block CEO and Key Executive Team Block's Head of Block and Square, Chairman, Co Founder is Jack Dorsey. Block's key executives include Jack Dorsey and 12 others.

CEO of Block at Block · Experience: Block · Location: Atlanta. View Jack Dorsey’s profile on LinkedIn, a professional community of 1 billion members.

He co founded Twitter, where he served as CEO, and later founded Square, a financial services and mobile payment company now known as Block. Block has shifted its focus toward decentralized technology and cryptocurrency since its rebranding in 2021.

Jack Dorsey, co founder and CEO of Block Inc.(NYSE:XYZ), on Monday encouraged merchants using the company's Square platform to test Bitcoin (CRYPTO: BTC) payments.

Mike Brock serves as the Chief Executive Officer at Block, where he focuses on strategic development and operational excellence. His expertise spans software engineering, project management, and leadership within the financial technology sector.

In 2021, Jack Dorsey changed Square’s name to “Block” to reflect his growing interest in blockchain technology. The new name also symbolized the company’s transition from its original payment services.

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