database design - EF Modelling Help: User with multiple Roles and Locations at a Company (Model First) -

i kind of stuck in easy modelling / design process. how design following model? i'm working entity framework 5 / model first.

• i have users working in companies.
• each user can have multiple roles in company.
• each user can work @ multiple locations company.
• a user can work @ more 1 company, , has choose in company's name acting (this important).

i designing weird looking ternary classes "userlocationcompany" has 1-n-relationships each entity (what when designing tables in db), , properties "user.currentcompany" ends having dead end @ company entity. right approach such problem?

you know better whether fits case, make location property of role? role link onto either location or perhaps 1 role can have many locations.

either way, stops repeating work of linking company , user, using existing connection add more data.

hope that's useful :)