Is it permissible for a father to force his daughter to work in a mixed environment?
Question

                Can a father force his daughter to work in a mixed environment?.
Praise be to Allah.
    Working in mixed environments is not free of the risk of some 
    haraam things happening, such as looking, being alone with a person of the 
    opposite sex, or feeling attracted. Hence the scholars have issued fatwas 
    stating that it is haraam, based on what usually happens. It says in 
    Fataawa al-Lajnah al-Daa’imah (12/156): 
Mixing of men and women 
    in schools and elsewhere is a great evil and has serious implications for 
    people’s religious and worldly interests. It is not permissible for a woman 
    to study or work in a place where men and women mix, and it is not 
    permissible for her guardian to allow her to do that. 

    Based on that, the father has no right to force his daughter 
    to work in a mixed workplace. If he forces her to do that then she does not 
    have to obey him, because the Prophet  (peace and blessings of Allaah be 
    upon him) said: “There is no obedience in sinful matters, rather obedience 
    is only (required) in that which is good and proper.” Narrated by 
    al-Bukhaari, 7257; Muslim, 1840. 

    This daughter must explain to her father the dangers of 
    working in a mixed environment, and that it is haraam. She should remind him 
    of his duty to protect his family and save them from the Fire, and she 
    should do so in a wise manner and with beautiful preaching.  

    And Allaah knows best.