Folders created by edw user will belong to edw user. It's possible to have the group changed automatically for you, but not the user. To create folders as edw_sca you will need to have edw login as edw_sca somehow, perhaps with sudo, i.e. sudo -u edw_sca mkdir /path/to/newfolder You will have to allow edw to run mkdir as edw_sca user in sudo. Changing sudoers requires admin access.
Alternatively edw_sca could create a directory writeable by edw. As Corona688 points out files in this directory will still belong to edw and may be difficult to move or delete.
scp is also a possibility but opens a whole new kettle of fish with respect to security if not done correctly.