When did Alex Stamos become CISO of Cognition?

The appointment was announced in the week of September 28, 2026, per SecurityWeek Industry Moves. The record holds the announcement, not a start date.

Where did Alex Stamos work before Cognition?

Before the appointment, Alex Stamos was Chief Privacy Officer at Corridor, according to the announcement (SecurityWeek Industry Moves).

Executive record

Alex Stamos

Alex Stamos is Chief Information Security Officer at Cognition. The appointment was announced in the week of September 28, 2026, per SecurityWeek Industry Moves.

Before the appointment: Chief Privacy Officer at Corridor, per the same source.

3 tracked moves on the Wire · Updated November 7, 2026

Career timeline

Every move the record holds for Alex Stamos, newest first, with the earlier roles the announcements name.

week of September 28, 2026· Appointment
Named Chief Information Security Officer at Cognition
Source: SecurityWeek Industry Moves (this week) ↗ · Move record
Before September 2026· Earlier role
Chief Privacy Officer at Corridor
Named in the announcement of the Cognition appointment · Source: SecurityWeek Industry Moves (this week) ↗
week of September 28, 2026· Departure
Departure as Chief Information Security Officer (CISO) of SentinelOne
Source: SecurityWeek Industry Moves (week of Sep 28, 2026) ↗ · Move record
week of July 29, 2024· Appointment
Named Chief Information Security Officer (CISO) at SentinelOne
Source: SecurityWeek Industry Moves (week of 2024-07-29) ↗ · Move record

The moves, from the record

Joining Cognition

Announced week of September 28, 2026 · Source: SecurityWeek Industry Moves (this week) ↗ · Move record

Alex Stamos has become CISO at Cognition. He previously served 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.

SecurityWeek's Industry Moves column for the week of September 28, 2026 reports that Alex Stamos has become Chief Information Security Officer (CISO) at Cognition. The entry is one of several people-on-the-move items in that weekly roundup, and it does not describe the scope of the role or give a start date.

The announcement described Stamos as a lecturer in computer science at Stanford University at the time of the announcement. It lists his earlier positions as CPO at Corridor, CISO and advisor to the CEO at SentinelOne, CSO at Facebook, and CISO at Yahoo!. It also says he was CTO at NCC Group's internal startup Artemis.

The announcement gives no tenure figures, qualifications, or statements from Stamos or Cognition. It says nothing about the reasons for the appointment or about who held the position before.

Leaving SentinelOne

Announced week of September 28, 2026 · Source: SecurityWeek Industry Moves (week of Sep 28, 2026) ↗ · Move record

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 was a lecturer in computer science at Stanford University at the time of the announcement. 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.

The company: Cognition

Sector: Cybersecurity Vendors
Region: North America
Company record: Who runs security at Cognition: 1 confirmed move on the record
Vendor directory: Cognition sells security products, filed under Vulnerability management. What it sells

In their own words

What Alex Stamos has posted and written in public while in the seat, each described in our words with a link to the original. A post loads from LinkedIn or X only when you choose Show post. All voices

Our take

Awareness Month comes around every October, and security leaders in any seat get pulled into it, whether as guest, host or the person asked to supply the calendar of activities. The opening of this post shows only a thanks for a recorded conversation on the month itself, so that is the subject we take up. Our view is that the month is most useful when it is treated as a hook rather than a programme: one concentrated window to ask for executive airtime, fresh attention on reporting channels, and a chance to test whether staff know where to send a suspicious message. The risk is that it becomes a themed-poster exercise that proves activity without changing behaviour. We would pick one or two behaviours that matter for the business, measure them before and after, and keep the effort running well past the end of October.

Elsewhere

Public profiles we matched to Alex Stamos by exact name and the company on our record. Links only; we do not copy from them.

X ↗

Appointed in the same period

Other security chiefs in Cybersecurity Vendors whose appointment was announced within 90 days of Alex Stamos's, nearest first (8 of 9). The Cybersecurity Vendors bench

September 29, 2026
Mathieu Rigotto, Chief Information Security Officer at Filigran
September 3, 2026
Grant Yacomeni, Chief Information Security Officer at Gigamon
September 1, 2026
Chris Jones, Chief Trust and Security Officer at Axonius
week of August 24, 2026
David Soto, Chief Information Security Officer at Trellix
November 4, 2026
Gerald Beuchelt, Chief Information Security Officer at Keyfactor
November 5, 2026
Kobi Sivilya, Chief Information Security Officer and Chief Information Officer at Checkmarx
week of August 17, 2026
Andrew Park, Chief Information Security Officer (CISO) at UltraViolet Cyber
July 28, 2026
Alexander Truskovsky, Chief Information Security Officer at EigenQ

Record facts

Time in the seat: About 1 month since the appointment was announced (week of September 28, 2026), as of November 2026
Moves on the record: 3 confirmed moves, each with its source
On the record since: September 26, 2026
Cybersecurity Vendors in 2026: 25 security-leadership appointments announced in the sector on the record

How these are counted. Time in the seat: Counted in whole months from the announcement of the appointment, the date the record holds; announcements rarely give a start date.

Questions about Alex Stamos

Who is the CISO of Cognition?: Alex Stamos is Chief Information Security Officer at Cognition. The appointment was announced in the week of September 28, 2026, per SecurityWeek Industry Moves.
When did Alex Stamos become CISO of Cognition?: The appointment was announced in the week of September 28, 2026, per SecurityWeek Industry Moves. The record holds the announcement, not a start date.
Where did Alex Stamos work before Cognition?: Before the appointment, Alex Stamos was Chief Privacy Officer at Corridor, according to the announcement (SecurityWeek Industry Moves).

Sources

1.SecurityWeek Industry Moves (this week) ↗: the appointment at Cognition, week of September 28, 2026; the departure from SentinelOne, week of September 28, 2026
2.SecurityWeek Industry Moves (week of 2024-07-29) ↗: the appointment at SentinelOne, week of July 29, 2024

This record begins with CISO Tribune's tracking in 2026.

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