Employment is a relationship between two parties, usually based on a contract where work is paid for, where one party, which may be a corporation, for profit, not-for-profit organization, co-operative or other entity is the employer and the other is the employee. Employees work in return for payment, which may be in the form of an hourly wage, by piecework or an annual salary, depending on the type of work an employee does or which sector they are working in. Employees in some fields or sectors may receive gratuities, bonus payment or stock options.
If you do not have a physical injury or a handicap that would prevent you from observing the correct form of prayer, which is standing up, then you are not allowed to pray sitting down.
Whatever the environment may be, you must be able to take breaks, in which you can find an empty space to pray in. If the situation is very bad, then you must think of leaving that toxic environment so you are able to express your religious freedom and do you wajibaat in the correct form.
And Allah knows best
If all necessary shar'i boundaries are observed as far as interaction with a non-mahram person of the opposite gender, then there would not be any problem.
For example, it being in open area, being careful of what type of conversation it is, avoiding lustful gazes, etc..
Another thing that could be applicable to certain situations like this is to avoid accusations or suspicious thoughts from others who might see you, but this would depend where you are and what is culturally appropriate in the place you live in.
And Allah knows best
Muslim is not allowed to take any part in alcohol businesses including making accounts of it. Money received for making accounts of alcohol business is also not allowed (Haraam).
Main thing is insuring her safety and security. She must be sure that she is fully able to protect herself and keep her respect and modesty as a Muslim female who performs Hijab and all religious duties. She should never take risk of living far away from her family when there is possibility of any harm on her her.
Both looking at non Mahram woman with make-up and mingling with her, are not allowed for Muslim man.
Muslim man should lower his gaze and avoid looking at non Mahram women especially when such looking moves his desire in any way.
Istikhara can not be repeated if it comes against what we mant. The only situation in which another Istikhara can be repeated is when the total situation changes and it becomes another matter.
It is not permissible because it is a type of touching with cloth with a non Mahram.
No. Muslim is not allowed to sell alcohol at all or take any part in such unlawful (Haraam) business.
If you are sure that you will never help in usury or any unlawful (Haraam) work, then you can work in such legal firm.
How can you be sure that your research results will not be used by others in wrong ways beside medical purposes? If you are really sure that your research will never be used but only in medical purposes, then it will be allowed to do such research, but if you have any possibility that others can misuse your research even in future or by illegal ways, then you must avoid such work because it is not allowed to put any effort to support wrong whether directly or indirectly, now or in the future.
If your employer has allowed you to keep the tips, you are allowed then to keep it. It is not a Sadaqa.
Muslim is not allowed to work in usury (RIBA) dealing. If the job is away from usury then it will be allowed, but if it is related to usury in any way like taking, giving, accounting etc then it will be not allowed.