After discussions fell through, Microsoft, who announced earlier this year that it was making a multi-million dollar investment into OpenAI, announced that it was hiring both Altman and Brockman. Microsoft CEO Satya Nadella announced both would lead a new advanced AI research team within the company, with Altman having the title of CEO of this specific research group.
Source: OpenAI in Turmoil After Firing Its CEO, With Microsoft Right in the Middle – IGN