CISO departure
Alex Stamos steps down as Chief Information Security Officer (CISO) of SentinelOne
Alex Stamos is stepping down as Chief Information Security Officer (CISO) of SentinelOne, as announced in the week of September 28, 2026.
Records: SentinelOne · Alex Stamos
| Person | Alex Stamos |
|---|---|
| Role | Chief Information Security Officer (CISO) |
| Company | SentinelOne |
| Announced | week of September 28, 2026 |
| Added to the record | October 30, 2026 |
| Source | SecurityWeek Industry Moves (week of Sep 28, 2026) |
Context from the record
- SentinelOne is filed under Cybersecurity Vendors, North America, on our record.
- Alex Stamos's other records on the Wire: Alex Stamos named Chief Information Security Officer at Cognition (week of September 28, 2026); Alex Stamos named Chief Information Security Officer (CISO) at SentinelOne (week of July 29, 2024).
- Other moves at SentinelOne: Alex Stamos named Chief Information Security Officer (CISO) at SentinelOne (week of July 29, 2024).
What this move signals
Alex Stamos had left his role as CISO and advisor to the CEO at SentinelOne by the week of September 28, 2026, when SecurityWeek's Industry Moves column reported he had become CISO at Cognition. The item does not give an exact date for his SentinelOne exit, only that it preceded the new role.
SecurityWeek's Industry Moves column for the week of September 28, 2026 says Alex Stamos has become Chief Information Security Officer (CISO) at Cognition. The entry appears among several people-on-the-move items in that week's roundup.
According to the announcement, Stamos is a lecturer in computer science at Stanford University. It lists his previous roles as CPO at Corridor, CISO and advisor to the CEO at SentinelOne, CSO at Facebook, CISO at Yahoo!, and CTO at NCC Group's internal startup Artemis.
The announcement lists SentinelOne only as a previous employer. It gives no date for his time there, no tenure figures, and no reason or timing for his move. It also does not describe the scope of the CISO role at Cognition.
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