When did Sean Cassidy become CISO of Plaid?

The appointment was announced in the week of June 15, 2026, per SecurityWeek Industry Moves. The record holds the announcement, not a start date.

Where did Sean Cassidy work before Plaid?

Before the appointment, Sean Cassidy was Head of Security at Asana, according to the announcement (SecurityWeek Industry Moves).

Executive record

Sean Cassidy

Career profile: Sean Cassidy on CISO Spotlights ↗

Sean Cassidy is Chief Information Security Officer (CISO) at Plaid. The appointment was announced in the week of June 15, 2026, per SecurityWeek Industry Moves.

Before the appointment: Head of Security at Asana, per the same source.

1 tracked move on the Wire · Updated November 11, 2026

Career timeline

Every move the record holds for Sean Cassidy, newest first, with the earlier roles the announcements name.

week of June 15, 2026· Appointment
Named Chief Information Security Officer (CISO) at Plaid
Source: SecurityWeek Industry Moves (week of 2026-06-15) ↗ · Move record
Before June 2026· Earlier role
Head of Security at Asana
Named in the announcement of the Plaid appointment · Source: SecurityWeek Industry Moves (week of 2026-06-15) ↗

The company: Plaid

Sector: Financial Services
Region: North America
Company record: Who runs security at Plaid: 1 confirmed move on the record

In their own words

What Sean Cassidy 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

Conference stages are one of the few places where security leaders can say out loud what rarely makes it into vendor decks or board packs, and an invitation to speak is worth treating as an opportunity rather than a courtesy. The visible text of this post raises only the fact of a stage appearance this week, with no detail on the talk itself, so we take it as a prompt about speaking in public. Our view is that leaders should say yes more often, but with a plan: pick one operational lesson the audience can reuse, clear it with legal and communications beforehand, and keep detail on internal incidents general enough to protect colleagues. The hallway conversations afterwards often yield more than the session, so go with a short list of peers you want to meet. Finally, bring something back to the team in writing, because a talk that changes nothing at home was only a day out.

Our take

The CISO of Plaid, whose appointment was announced in June 2026 and who arrived from the head of security role at Asana, opens a post on cybersecurity awareness by noting that recent events may have made it harder for anyone to ignore. A bad stretch in the news does raise attention, and that attention is real, but it fades quickly and rarely turns into lasting behaviour. We would treat a noisy month as a short window to ask for what awareness alone cannot supply: funding for phishing-resistant authentication, cleaner offboarding, tested incident drills, and a plain channel for staff to report mistakes without blame. Where we would add caution is in measuring success by how well people recall headlines, since attackers go after process gaps more than ignorance. Awareness is the opening, and the programme work that follows is what decides whether it was worth having.

Talks and interviews

Conference sessions, podcast episodes and videos with Sean Cassidy that the record holds, each from the event or the show's own page. The speaking circuit · Podcasts

October 6, 2026· Podcast appearance, tprmpodcast.com
Sean Cassidy, Chief Information Security Officer (CISO) at Plaid
Why Security “Best Practices” Are Broken — Sean Cassidy
On the limitations of conventional security best practices
Listen at tprmpodcast.com ↗

Elsewhere

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

LinkedIn ↗

Appointed in the same period

Other security chiefs in Financial Services whose appointment was announced within 90 days of Sean Cassidy's, nearest first (8 of 24). The Financial Services bench

week of June 15, 2026
Ann Barron-DiCamillo, Executive Vice President and Global Chief Information Security Officer at U.S. Bank
June 15, 2026
David Nolan, Chief Security Officer at Trimont
June 2026
Ahmed Pasha, Global Chief Information Security Officer at Tradeweb
June 2026
Bryan Thompson, Chief Information Security Officer at Luma Financial
June 2026
Cyrus Tibbs, Chief Information Security Officer at First American
June 2026
John Walton, Chief Information Security Officer at Nubank
June 2026
Mike Brown, Chief Information Security Officer at Farmers & Merchants Bank of Long Beach
June 2026
Randi Kieffer, Chief Information Security Officer at USAA

Record facts

Time in the seat: About 5 months since the appointment was announced (week of June 15, 2026), as of November 2026
Moves on the record: 1 confirmed move, each with its source
On the record since: September 24, 2026
Financial Services in 2026: 42 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 Sean Cassidy

Who is the CISO of Plaid?: Sean Cassidy is Chief Information Security Officer (CISO) at Plaid. The appointment was announced in the week of June 15, 2026, per SecurityWeek Industry Moves.
When did Sean Cassidy become CISO of Plaid?: The appointment was announced in the week of June 15, 2026, per SecurityWeek Industry Moves. The record holds the announcement, not a start date.
Where did Sean Cassidy work before Plaid?: Before the appointment, Sean Cassidy was Head of Security at Asana, according to the announcement (SecurityWeek Industry Moves).

Sources

1.SecurityWeek Industry Moves (week of 2026-06-15) ↗: the appointment at Plaid, week of June 15, 2026
2.CISO Spotlights career profile ↗: a fuller career profile on a sister site

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

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