The predefined QContactOrganization has a field "AssistantName", but no field "ManagerName".
Surely we all usually only deal with the top-level people but at least in the contact data model of Active Sync there is also a field "ManagerName" [ASMN] which cannot be mapped to the QContactOrganization currently, but has to be stored away in a separate custom detail with just that field.
Given that ActiveSync seems quite in use (no comment if for good or bad) QContactOrganization should also have a field "ManagerName".

[ASMN] http://msdn.microsoft.com/en-us/library/ee200862(v=EXCHG.80).aspx