It is possible to give administration rights to any user. To do so, go to Access rights and then in the section "Manage Administrators":
By default, these users will be able to administrate all access rights on the entire organisation.
To grant administrative rights only on a limited group of sites, it will be necessary to create a delegation:
For Analyzer NX, access rights are based on contracts and domains. It is not possible to have more than one administrator for each contract, as they are our administrative point of contact. However it is possible to create Power User profiles that have all the same permissions.