Even so, chiefs are relatively rare compared with presidents and their various declensions (vice -, assistant -, etc).

即便如此，首席官较之于总裁或挂有总裁二字头衔(如副总裁，总裁助理等)的人相比还是稀罕之物。

youdao

The Unit is run by Charles Duross along with his three Assistant Chiefs.

FORBES: Move Over, DOJ: The SEC Can Charge Private-Sector Bribery Too

John Pustay, assistant to the chairman, Joint Chiefs of Staff and president, National Defense University.

CENTERFORSECURITYPOLICY: Center for Security Policy | What hazards along the road to Damascus? Mission impossible

He is currently assistant at Super 14 team the Chiefs and is also in charge of the Waikato NPC side, and Waikato Rugby Union chief executive Graham Bowen said he departs with their blessing.

BBC: Gatland unveiled as Wales coach