You can not pass classes to the redirected actions like that. Redirection is done by means of URL. Url is a string, so it can not contain classes (serializing objects to url is really out of logic here)
Instead, you could use TempData
TempData["searchJob"] = searchJob;
return RedirectToAction ...;
and in Action redirected
Entity.SearchJob = (Entity.SearchJob)TempData["searchJob"] ;
After executing of the code above, TempData will not contain searchJob anymore. TempData is generally used for single time reading.
But I do not like the way above. If I were in your place and wanted to search jobs by name, I would add route parameters like
RouteValueDictionary dict = new RouteValueDictionary();
dict.Add("searchJobName", searchJob.JobName);
and receive it to action via parameter
public ActionResult SearchJob(string searchJobName)
{
... do something with the name
}
This way, you get better user and HTTP friendly URL and from the Action point of view, it would get all the parameters it needs from outside. This is better for testing, maintenance, etc.