Post-Training & Research Infrastructure Lead · xAI · 2025
Early member of xAI's post-training team who led post-training and research infrastructure for the Grok models, and became an internal advocate for AI safety — warning that Grok lacked adequate safeguards against discrimination, weapons-related outputs, and political bias. According to his June 2026 wrongful-termination lawsuit, xAI fired him in September 2025, days before he was due to present his safety findings, with co-founder Jimmy Ba telling him they should "go their separate ways."
The account of his firing is drawn from Kim's lawsuit against xAI and SpaceX (California state court, June 2026); the allegations have not been tested in court, and xAI did not respond to requests for comment. In June 2026 Kim was named president of the Center for AI Safety.
Correction: Reclassified to alleged on 2026-07-22: retaliation link is asserted by the individual and disputed or unresolved; attribution-first wording applied.