Is it permitted to work in jobs with mixed-gender environments in the West? With the knowledge that it is difficult to find work that does not involve mixing between the genders?

Shaykh Muḥammad Bāzmūl:

If this is the situation, and the Believer in question can restrain his gaze and himself from temptation and looking at what Allāh has forbidden, and avoid violations to the law – so he does not end up in seclusion with a strange woman – and he has no way to work except in this manner while he actually needs to work and earn, we say that choosing the lesser of the two evils when he has no choice but to do one or the other, he is permitted to work in such an environment, but with the conditions mentioned previously. And Allāh alone we ask for help.