WASHINGTON—Late Sunday, a group representing thousands of FBI agents told its members it was optimistic about the agency’s future, in part because its new director, Kash Patel, had assured the group he would choose a deputy from among their ranks.

There will still be an institution called the Federal Bureau of Investigation, but with Kash Patel and Dan Bongino at the helm, it will not be the FBI.

Dan Bongino has been chosen as the FBI's second-in-command, a job that doesn't need Senate confirmation. Here's what to know about the Secret Service agent-turned-conservative media personality.