https://www.siliconvalley.com/2021/09/23/facebook-chief-technology-officer-schroepfer-to-step-down/

Facebook’s Chief Technology Officer Mike Schroepfer, a 13-year veteran who oversees the social network’s work in artificial intelligence, virtual reality and the blockchain, will step down next year.

Another longtime Facebook executive, Andrew Bosworth, will take over as CTO, according to an internal message on Wednesday from Chief Executive Officer Mark Zuckerberg. Schroepfer’s move marks the most significant departure from the company in years and follows the recent exits of several other top executives.