George Antoniadis graduated from Athens College in 1980 and holds a Diplom in Electrical Engineering from the Federal Institute of Technology in Zurich (ETH), and an MBA with Distinction from Harvard Business School. He is the founder and CEO of PlaneSense, Inc., founded in 1995, one of the three industry leaders in the aircraft fractional ownership space globally. Before establishing PlaneSense, he was a management consultant at McKinsey & Company, Inc.

He joined the Board of Trustees of Athens College in Greece in 2017 and served as its Treasurer since 2018. In March 2023 he was appointed Chairman of the Board.