X has appointed Michael O'Herlihy as its new Head of Safety, according to an announcement from the platform's official safety team account. O'Herlihy will oversee user and brand safety across X's platform and AI systems while maintaining free expression and improving transparency in safety operations. O'Herlihy is scheduled to speak at the Brand & AI Safety Summit in New York on November 10, where he will address the role of open systems and user-visible controls in platform safety and advertiser confidence.