Sharepoint Online Condiguration (Microsoft Online Services Hosted)

Designing a SharePoint Online (Hosted by Microsoft Online Services) portal. Account is already created. Just need basic document storage and document management functionality. (1) Need to configure the following. Create folder ( CONSTRUCTION PROJECTS) where users can download files posted by administrator for read only access When these users login they will only be able to see one folder to which they were granted "read only" access Most files will be large PDF but possibly some construction CAD files also Administrator will be able to create users to login, view and download files with only read only access. These users will be non-employees (2) Create another folder for administrative purposes for internal employees (ADMINISTRATION) Users will have varying levels of permissions to access the various subfolders. (3) Integrate SharePoint with active directory so that employees can use existing signon for login to SharePoint site (4) If possible leave non-employees with sign-on capabilities from Microsoft Online Services Only individuals with Sharepoint Online experience should bib on this. Will check your profile before accepting. Must be able to speak English properly. I have Skype account for communication if necessary, Bidders must be able to work between 7am and 11pm EST