Initialize object not in controller but in own class - is it any pattern?

Sometimes I have to fill a model before I pass it to a view. I can do it in an action in a controller:

public class FormController
{
    public ActionResult Index(int recruitmentId, int employerId)
    {
        EmploymentForm employmentForm = new EmploymentForm();
        employmentForm.StartDate = new DateTime();
        employmentForm.RecruitmentId = recruitmentId;
        employmentForm.EmployerId = employerId;
        // much more properties with some logic (for example connect to database to fill them)

        return View(employmentForm);
    }
}

But then the action is very long so I create my own class and I fill the model there:

public class EmploymentFormInitializator
{
    private int _recruitmentId;
    private int _employerId;
    public EmploymentFormInitializator(int recruitmentId, int employerId)
    {
        _recruitmentId = recruitmentId;
        _employerId = employerId;
    }

    public EmploymentForm Init()
    {
        EmploymentForm employmentForm = new EmploymentForm();
        employmentForm.StartDate = new DateTime();
        employmentForm.RecruitmentId = _recruitmentId;
        employmentForm.EmployerId = _employerId;
        // much more properties with some logic (for example connect to database to fill them)

        return employmentForm;
    }
}

Then my controller is very short:

public class FormController
{
    public ActionResult Index(int recruitmentId, int employerId)
    {
        EmploymentFormInitializator employmentFormInitializator = new EmploymentFormInitializator(recruitmentId, employerId);
        EmploymentForm employmentForm = employmentFormInitializator.Init();

        return View(employmentForm);
    }
}

What pattern I use in that case? Is EmploymentFormInitializator class maybe a factory, builder or maybe it isn't any pattern?