Stamos won’t be replaced after he leaves, meaning no one will hold the title of “chief security officer” at Facebook. […] “We are not naming a new CSO, since earlier this year we embedded our security engineers, analysts, investigators, and other specialists in our product and engineering teams to better address the emerging security threats we face,” a Facebook spokesman said in an email. Facebook will “continue to evaluate what kind of structure works best” to protect users’ security, he said. […] “We expect to be judged on what we do to protect people’s security, not whether we have someone with a certain title,” a spokesperson said.
https://www.theverge.com/2018/8/1/17640852/facebook-cso-alex-stamos-departing-no-replacement