Where does your self-esteem come from? For some people it comes from their title, for some from the organization they work for or for some the family or nation they belong to.
More your self-esteem is tied to some thing external, the more vulnerable you are. Self-esteem should come from a strong character base which springs from a stream of wholesome values. Self-esteem should be based more on one's own contribution in different areas of life, more than anything else.