Coates has reportedly been replaced on an interim basis by Joseph Camileri, a senior manager for information security and risk.
This comes following the impending and rumored departures of other high-level security officers at Google and Facebook.
Yesterday, Google Director of Information Security Engineering Michael Zelewski announced his upcoming departure on Twitter. With Facebook, there were reports that CSO Alex Stamos was leaving his role, but that seems to not be true. Instead, Stamos said his role is simply changing to focus more on election security and emerging security risks.
I’ve reached out to Twitter and will update this story if I hear back.