Can't create strongly typed Controller in MVC

I a new to MVC and am trying to create a Controller based on a model that I defined in a class.  I am using EF and have a model based on a SQL Server database.  I need to get data from an ORACLE database and combine it with the data from the SQL Server database.  I can't do this using a View so I have a class that defines the fields I need from the ORACLE database.  When I try and create a controller based on my model I am getting the following error:

Unable to retrieve Metadata for 'ENL.Models.EmployeeExtract'.  One or more validation errors were detected during model generation:

- System.Data.Entity.EdmEntityType: EntityType 'EmployeeExtract' has no key defined.  Define the key for this EntityTYpe.
- System.Data.Entity.Edm.EdmEntitySet: EntityTYpe: ENtitySet 'Employees' is based on type 'EmployeeExtract' that has no keys defined.

Here is my code:

using System.Web;
using System.Data;
using IntranetSupportTeam_i21Login;
using EmployeeProfileDatabase;
using System.Data.Entity;

namespace ENL.Models
{
    public class EmployeeExtract
    {
        public int profileID { get; set; }
        public string firstname { get; set; }
        public string lastname { get; set; }
        public int locationid { get; set; }
        public string emailaddress { get; set; }
        public string homephone { get; set; }
        public string mobilephone { get; set; }
        public string businessmobilephone { get; set; }
    }

    public class EmployeeExtractDbContext : DbContext
    {
        public DbSet<EmployeeExtract> Employees { get; set; }
    }
}

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Any help is greatly appreciated!