George Antoniadis graduated from Athens College in 1980 and holds a Master 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, president and CEO of PlaneSense, Inc., one of the three industry leaders in the aircraft fractional ownership space globally, founded in 1995. 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.