The social media giant has named Peters Atco to run security.

He's better known by his hacker handle, Mudge.

In an exclusive interview with Reuters, he said he would look at everything from information and physical security to site and platform integrity.

Zack goes colorful.

Career began in the 19 nineties.

Back then, he was among leaders of hacker group Cult of the Dead Cow.

It released Windows hacking tools to goad Microsoft into improving security.

At the very same time, he was also working on classified projects for a government contractor.

Later, he worked on cybersecurity for the Pentagon's famed Defense Advanced Research and projects agency, DARPA.

Now he won't be short of challenges at Twitter, which is frequently targeted.

In July, a group of young hackers gained access to internal tools that let them tweet from top accounts.

Then presidential candidate Joe Biden was among those hit, as was Tesla chief Elon Musk.