An administrator member in your CO is authorized to invite new members, remove members from the CO and to appoint developers.

If you have admin rights yourself you can grant these rights to another CO member.

Login to the Research Access portal.

Click on the blue arrow left of the CO that you want to appoint a developer in:

In the members list, each member has a drop-down list which you can use to select the role of that member.

Choose "Admin" to appoint a member admin of the CO:

Note that it might take up to five minutes for these changes to take effect in the Research Cloud portal!