管理员 = superintendent

经理 corresponding Word “manager” ，means person controlling or administering business or a company.etc. 管理员 in chinese，generally means，person managing affairs,such as network administrator ,building administrator and so on

管理员is used in different situations as a manager to responsible for all stuff and deal with whole problems.it is often widespread using.经理 is in occasion of corporation management as a manager.

thanks.

经理 is corresponding to "manager" quite exactly, it often used as a regular job title, such as 总经理,部门经理,客户经理, etc. It is in management. 管理员 is usually not a manager but a junior staff some affairs, such as 仓库管理员, 资料管理员, and so forth.