Can you fail an employment history background check for not listing a past employer?
They absolutely can disqualify you for leaving out information. The good thing is that there is really no central database for employment history that they can search. But here is how they find out… they take your application and verify every job you list including the start and end dates. They build an employment history based off this information and look for lapses in employment. I assume there will be a period of time in which it will show you as having no job (the time you worked for the company you chose not to list). They may come back to you and ask what you did during that time. You can lie and tell them you were unemployed and it would be hard for them to prove otherwise. I am not suggesting you do that at all as it is illegal to misrepresent information on an application. If you adjusted your employment dates at other jobs to try and make it look as if you were never at the other job or unemployed you may be in some trouble assuming they do contact each job you listed and