Alex Stamos is joining Cognition as its new chief security officer; he most recently oversaw security at AI security startup Corridor and SentinelOne

AI development tools will be more secure against adversarial attacks and data breaches.

Alex Stamos has been appointed as the new Chief Security Officer (CSO) at Cognition, an AI coding company valued at over $1 billion. Stamos previously held significant security leadership roles, including overseeing security at the AI security startup Corridor and serving as Chief Information Security Officer (CISO) at SentinelOne, a major cybersecurity firm. His appointment indicates a heightened strategic emphasis on security for Cognition, a company experiencing rapid growth within the artificial intelligence sector. This move signals that robust security measures are becoming a critical priority for advanced AI development companies.

Stamos's transition to Cognition underscores the burgeoning importance of dedicated security leadership within AI-native companies. As AI models become more sophisticated and integrated into critical infrastructure, the attack surface expands, necessitating specialized expertise. This hire suggests Cognition aims to proactively address emerging AI-specific security threats, such as data poisoning, model inversion, and prompt injection, rather than reacting to them.

The move also reflects a broader trend where AI companies are investing heavily in security infrastructure and talent, recognizing it as a competitive differentiator and a prerequisite for enterprise adoption. Stamos's reputation as a leading figure in cybersecurity, particularly his experience with both AI security startups and established cybersecurity giants, positions Cognition to potentially set new industry standards for AI security.