OpenAI regains a key executive.

OpenAI president and cofounder Greg Brockman, who took a 3-month leave of absence from the company, is back at the company. (Brockman previously said his sabbatical would last through the end of the year.) His return comes after the startup lost several key leaders: CTO Mira Murati and chief research officer Bob McGrew.

Per a memo, he’s working with CEO Sam Altman on creating a new role for him.