Is the presence of a cleaner or a guard considered evidence of mixing in the workplace, and is it permissible for a woman to work in a mixed environment without necessity, even with adherence to controls, and is working to cover tuition fees considered a necessity?

Unlawful mixing (Ikhtilat) is the gathering of men and women when there is a forbidden شرعي (Shar'i) element present, such as showing off adornment (tabarruj) or speaking alluringly. The ruling on mixing varies depending on its compliance with the rules of Islamic law. It becomes forbidden if there is a private seclusion (khalwa), or looking with lust, or if the woman is immodestly dressed and not observing proper hijab, or if there is frivolity, amusement, and physical touching. The mere presence of men and women in one place is not ruled as forbidden unless a forbidden شرعي (Shar'i) act is committed. If a woman observes the شرعي (Shar'i) guidelines in her going out to work, it is not ruled as forbidden, even if she is not in need of money. The provision of tuition fees depends on the woman's need to complete her studies and the community's need for her specialization.