Kissner, Twitter’s former chief information security officer, or CISO, resigned from the company on Thursday. Kissner, who uses they/them pronouns, announced their departure on Twitter, but did not specify a reason.
“I’ve made the hard decision to leave Twitter. I’ve had the opportunity to work with amazing people and I’m so proud of the privacy, security, and IT teams and the work we’ve done,” they tweeted.
They were Twitter’s most senior cybersecurity official, and their departure and others have raised eyebrows over at the Federal Trade Commission. The company is under two FTC consent decrees for violating user security and privacy in the past. Violating the decrees risks generating billions in fines from the federal agency.