[header] How to handle intimidation [title] Avoid taking the behavior personally. [step] Although it can be difficult, your strongest defense against intimidation is to recognize that the person's behavior has nothing to do with any deficiency in you or your work. [substeps] This is especially true if the person is threatening your job or insulting you in front of co-workers. 
When dealing with someone like that, it's easy to believe that your work is sub-par and that you need to do more. However, sometimes your work is just as good, if not better, than that of your co-workers.