In Islam only those persons are called Mehram, whom u can't merry. i.e. Your real Father and real Grand Father, real Brother, real Son and Son of your real brothers, real sisters and your real uncles (Brothers of your real father and real mother). Husband of your real sister is not Mehram for you. Hope u r satisfied now.
I have been working with my cousin's husband for about 6 months. He is my boss. My cousin is actually my uncle's daughter (my uncle is my mother's older brother).
So, I guess he is strongly related to me but to what extent? Can I consider him as a mahram too?