Gregory Hayes is an American businessman known for his role as the CEO of Raytheon Technologies, a major aerospace and defense company. He has been instrumental in leading the company through significant mergers and acquisitions, including the merger of Raytheon Company and United Technologies Corporation in 2020. Hayes has a background in engineering and business, holding degrees from Michigan State University and Harvard University. Under his leadership, Raytheon Technologies has focused on innovation and sustainability, aiming to enhance its position in the global defense and aerospace markets.