Best method for reusing model data across controllers

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ASP.NET

MVC

entity-framework

Hi there i have an app with multiple controllers for a staff intranet. All of the controllers use the logged in user to show data for their records from multiple data stores. I have to repeatedly restrict my data in each controller to a derived variable based on the logged in user. In the interests of DRY what is the best way of doing this.would a public class that accepts a username and returns userid , name etc be the way to go? or a controller that is referenced from within all other controllers? Or store them as session variables when logging in? Any help would be greatly appreciated

Regards

Jason