The former Airbnb executive joined the company in April and departed around the end of July, according to the WSJ.

While at Xai, he helped orchestrate the company’s $5 billion debt hike along with another $5 billion in equity. Almost half of that came from SpaceX. He also oversaw some of the Elon Musk-owned AI firm’s data center expansion in Memphis.

Liberatore’s departure has been working for over a year after Xai’s legal counsel Robert Keele left in August. Senior lawyer Raghu Rao left at about the same time as Keele and Liberatore according to the WSJ. Xai co-founder Igor Babuschkin announced his departure last month.

Former X CEO Linda Yaccarino resigned in July over his actions from Xai chatbot Grok. Xai got his X in late March.