Paul McKellar is a highly successful individual who has excelled in the tech industry. He attended the prestigious Eastside High School before moving on to study at Georgia Tech. McKellar's education has clearly given him a strong foundation for his career. He went on to become a part of the founding team at Square.

Square is a well-known payment processing platform that has revolutionized the way we conduct transactions. Being part of the founding team at a successful company like Square is a testament to Paul McKellar's expertise and skillset. From his experience with Square, it's safe to assume that McKellar is an expert in the field of payment processing and finance.

Overall, Paul McKellar has a rich background in the tech industry, with a focus on payment processing and finances. He has honed many valuable skills and is an expert in his field. His contributions to Square have helped establish it as one of the most popular payment processing platforms in the world.