How to post view model to controller - asp.net-mvc

Question

I am trying to create a view that takes a view model, simply has an int property and a list of child model, with int; string; string properties.
What i am trying to do is everytime user clicks an "add line" button, i am creating a new child model in my view model list, letting user edit the properties and then want to post back to my controller but no matter what, it is always empty.
I know this must be simple but has me stumped for hours today? Is there some magic that needs to happen?
Any help appreciated.
My Controller:
using System.Web.Mvc;
using WebApplication1.Models;
namespace WebApplication1.Controllers
{
public class EmployeeUploadController : Controller
{
// GET: EmployeeUpload
public ActionResult EmployeeUpload()
{
var vm = new EmployeeBulkUpload { UploadedBy = 12345 };
vm.Employees.Add(new EmployeeBulkUploadItem { Id = 1, JobTitle = "Labourer", Name = "Jimmy" });
return View(vm);
}
[HttpPost]
[ActionName("EmployeeUpload")]
public ActionResult EmployeeUploadPost(EmployeeBulkUpload vm)
{
return View(vm);
}
}
}
My Model:
using System.Collections.Generic;
namespace WebApplication1.Models
{
public class EmployeeBulkUpload
{
public EmployeeBulkUpload()
{
Employees = new List<EmployeeBulkUploadItem>();
}
public int UploadedBy { get; set; }
public List<EmployeeBulkUploadItem> Employees { get; set; }
}
public class EmployeeBulkUploadItem
{
public int Id { get; set; }
public string Name { get; set; }
public string JobTitle { get; set; }
}
}
My "Container" view:
#using WebApplication1.Models
#model WebApplication1.Models.EmployeeBulkUpload
#{
ViewBag.Title = "EmployeeUpload";
}<div>
#using (Html.BeginForm("EmployeeUpload", "EmployeeUpload", FormMethod.Post))
{
<h2>EmployeeUpload</h2>
<button>Add New</button>
foreach(EmployeeBulkUploadItem emp in Model.Employees)
{
Html.RenderPartial("_EmployeeUploadItem", emp);
}
<input type="submit" name="SaveButton" value="Save" />
}
</div>
My Item Partial view:
#model WebApplication1.Models.EmployeeBulkUploadItem
<li>
#Html.LabelFor(x => x.Id)
#Html.EditorFor(x => x.Id)
#Html.LabelFor(x => x.Name)
#Html.EditorFor(x => x.Name)
#Html.LabelFor(x => x.JobTitle)
#Html.EditorFor(x => x.JobTitle)
</li>
I can load with one record and post straight back but is always empty in my Controller EmployeeUploadPost method?