Is it permissible for a Muslim labor inspector to enter companies that trade in prohibited items like tobacco and alcohol—knowing that the law does not prevent this—in order to ascertain the conditions of workers as part of his job?

It is not permissible to work in a profession that involves monitoring the distribution of tobacco and the production of alcoholic beverages, because that is considered aiding in sin. However, if a person is compelled and cannot find any other work, then it is permissible for him to continue in it until he finds an alternative, because necessities permit the forbidden, with the obligation to leave it as soon as the necessity ceases.