There are actually two kinds of account managers in securities companies: one is the staff who handle counter securities business, and the other is the channel account manager. The former needs to be a channel account manager in addition to the counter business, while the latter only develops customers, but the former's work is not entirely more important than developing customers.
The treatment of the two is basically the same, the former has a higher basic salary and the latter has a lower basic salary.
Generally speaking, the development management intermediary belongs to the business development department of securities companies.