If you want to apply for the station service, you can search for the Beijing subway in Baidu, open it, and there are recruitment information in the website announcement, or go to Zhilian to recruit and submit resumes on the pages of four operating branches for notification.
If you want to apply for a security inspector, you can only find an intermediary, because the security inspector does not belong to the Beijing subway staff, but belongs to the security company, and signs a contract with the security company, which does not belong to the Beijing subway.
The station service is a formal employee of the subway, but the security check is not.