Does he have to migrate from an area where a lot of sin is committed, even though he works there?

No File Exists
Check below answers in case you are looking for other related questions:
He wants to migrate, fleeing for the sake of his religious commitment from temptation, but his father will not let him
The reason why jihaad is prescribed

No File Exists
Related Answers:
Treatment of prisoners-of-war in Islam
Punishments for neglecting jihad for the sake of Allaah
Ruling on a Muslim travelling to the land of disbelief to settle and reside there
He wants to migrate, fleeing for the sake of his religious commitment from temptation, but his father will not let him
The reason why jihaad is prescribed

Recommended answers for you:
What is the janaabah that makes ghusl obligatory?
Does continually passing wind invalidate wudoo’?
Reciting Surahs and Aayahs in a different order
How can we increase the love of the Prophet (peace and blessings of Allaah be upon him) in our hearts?
Ruling on animated drawings (cartoons)