In a memo on Sunday evening, the FBI Agents Association told its 14,000 members that new director Kash Patel had assured them that he would follow tradition and name a career special agent with operational expertise as his deputy director.

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.

FBI deputy director Dan Bongino is a bombastic podcast host who has never worked at the FBI and has spent years pushing conspiracy theories about the bureau.