Delegation of modifying the membership of groups

Hi All,

In our domain, we have an OU called Workstation, under which there are many sub OUs called like DepartmentA,DepartmentB, DepartmentC... Under every sub OU (department OU) there is a group called likeGroupA, GroupB or GroupC...

I would like to delegate the permission of modifying the membership of GroupA, GroupB, GroupC, etc. to someone. Is there a short way to manage it? There are too many sub OUs underWorkstation OU and thus there are too many groups under each sub OUs. It's too difficult to configure each groups. And I should not grant the access from theWorkstation OU level as there are many other groups and sub groups.

Thanks,
高麻雀