Should he work for a company whose boss is a kaafir?
Question

                I am a young Muslim man and praise be to Allaah I work in one of the Arab countries, but my boss at work does not pray, and he watches permissive channels and listens to music. I spoke to him about these things one day and he told me that he knows that listening to music is haraam, and so is watching permissive channels. But with regard to prayer he told me that it is just because of laziness and the Shaytaan, and he is trying to deal with it. I offered to help him but he refused, and he is still not praying, and he is still listening to music and watching permissive channels. Is it haraam for me to work with him or is the money I get from working with him haraam? Please advise me.
Praise be to Allah.Your 
    earnings and your work have nothing to do with your boss’s situation or his 
    not praying or his listening to music or watching haraam things. You should 
    keep on trying to advise him without getting too close to him, because there 
    is the fear that he may influence you. 
You also 
    have to apply the rulings of sharee’ah with regard to your boss, if he 
    continues to neglect prayer – such as not initiating the greeting of salaam 
    with him and not liking him in your heart. We have already discussed a great 
    deal about the rulings on not praying and the fact that it is kufr 
    (disbelief) and riddah (apostasy). 
Shaykh 
    Muhammad al-Saalih ibn ‘Uthaymeen said: 
We advise this brother who works with kaafirs to look for a job where there are no enemies of Allaah and His Messenger, who follow religions other than Islam. If that is possible, what is how it should be. If that is not possible, then there is no sin on him because he is doing his job and they are doing theirs, but that is subject to the condition that there should be no feelings of love or friendship towards them in his heart, and that he should adhere to the teachings of sharee’ah with regard to greeting them and returning their greetings, and so on. Also he should not attend their funerals or their festivals, or congratulate them on the occasion of their festivals. (Majmoo’ Fataawa al-Shaykh Ibn ‘Uthaymeen, 3/39, 40).
 And Allaah knows best.