Data Scientist is wanting different permissions than original Ranger permissions on directory files after they initially land. Is this something that can be done in Ranger?
Inherently isn't possbile, but can be achieved easily using the Ranger REST api,
once the files arived to the directory update the policy with desired permissions. (pragmatically), the rest call can be achieved by curl PUT command using the resource
Ranger REST interface documentation(to update the policy) can be found here
Hope this helps !!