X Head of Brand Safety Elyana Thierry left in June per her LinkedIn page, months after being elevated to the role after the previous head resigned in the summer
Erin Woo / The Information : Bluesky: @caseynewton.bsky.social . X: @erinkwoo , @adamkovac , @bendreyfuss , @aishacounts , @tomcoates , @taylorlorenz , @rothschildmd , @marmel , @rmac18 , and @rmac18 Bluesky: Casey Newton / @caseynewton.bsky.social : Why. Did something happen [embedded post] X: Erin Woo / @erinkwoo : New: Twitter/X's head of brand safety, Elyana Thierry, has left the company, per her LinkedIn, just months after being elevated to the role after the resignation of the previous head of brand safety https://www.theinformation.com/ ... Adam Kovacevich / @adamkovac : The fact that people keep taking this job, thinking that it's even possible, is so cute Ben Dreyfuss / @bendreyfuss : Being the head of brand safety at Twitter is like being the third person in charge of al-Qaeda: no one stays in the job long. Aisha Counts / @aishacounts : Not a good sign when X advertising revenue is down by 60% and the #1 concern for advertisers has been brand safety Tom Coates / @tomcoates : What's that? People focused on trust and safety issues know both (1) that they will find their job untenable at Twitter and (2) that they will have no career in the area anywhere else if they go along with Elon's bullshit? I'm as surprised as blah blah blah. @taylorlorenz : Brands are gonna love this! Mike Rothschild / @rothschildmd : I can't wait to hear how the ADL made him do it. @marmel : has he blamed the jews for this? @rmac18 : @lindayaX It also comes after @elonmusk has said outside activist groups are responsible for the loss of billions of dollars in advertising revenue, and not, say, his own company laying off employees who oversee trust and safety matters. @rmac18 : This comes after CEO @lindayaX emailed staff in late July to say that trust and safety “is such an important effort at X” and as she tries to convince brands and agencies that the platform is a safe place to run ads. https://twitter.com/...
Context & Ripple Effects
Thierry’s departure extends a run of turnover in X’s safety organization: Ella Irwin resigned as trust and safety chief earlier in the summer, after prior cuts had reduced the team focused on civil conversation.
The leadership change lands as X had assigned trust-and-safety oversight jointly to Musk and Yaccarino, while earlier advertiser concerns had already contributed to recommended pauses in Twitter ad spending. Brand safety is therefore both an operational function and a commercial credibility issue.
First-order effects
- X loses the executive identified with brand safety only months after her elevation, requiring its remaining leadership to absorb or reassign that remit.
- Advertisers and agencies evaluating X’s safeguards have another personnel change to factor into their assessment of who owns brand-suitability decisions.
Second-order effects
- Yaccarino and Musk face greater pressure to make trust-and-safety accountability legible, because their shared oversight structure now sits above another leadership departure.
- Agency and advertiser caution can become self-reinforcing: uncertainty over safety leadership may raise the value of demonstrable placement controls and clearer escalation processes.
Third-order effects
- If repeated turnover persists, platform trust functions risk becoming less institutionalized and more dependent on shifting executive ownership—an especially difficult model for ad-funded platforms seeking stable brand-safety commitments.
- The broader test is whether safety can be operated as durable platform infrastructure rather than as a role that is repeatedly reorganized during product and business change.
The trend: This is one data point in the trend of trust-and-safety leadership becoming a core governance and revenue-risk issue for social platforms.