As salaam alaikum.
Here is what I found for you:
Selling alcohol or any other unlawful thing is a great evil. and so is working in a place that produces alcohol and other such vile products. Allah says:And help each other in righteousness and piety, and help not one another in sin and transgression and remain fearing Allah.
Without a doubt, selling alcohol, drugs or cigarettes comes under the second part of the verse. Allah Almighty says about alcohol:'O believers! Wine and gambling and idols and divining arrows are only unclean things, a work of devil (Satan) then save yourselves from them, so that you may prosper. The devil (Satan) desires only to put hatred and enmity among you in regard to wine and gambling and to bar you from the remembrance of Allah and from prayer, will you then desist?
In an authentic Hadith, the Messenger of Allah (saws) cursed alcoholic drink, the one who consumes it, one who gives it for others to drink, the one who prepares it, the one who has it prepared, the carrier of it, the one it is carried to, the buyer, the seller, and the one who benefits from its profits.
In another authentic Hadith, the Prophet (saws) said,
"Indeed, upon Allah is a covenant that whoever drinks alcohol, he will give him Tinatul-Khibal to drink."
Someone asked, "O Messenger of Allah, what is Tinatul-Khibal.
"The (gastric) juices of the inhabitants of the Fire,"
Or he said.
"The sweat of the inhabitants of the Fire." (Muslim 2002)
The ruling upon the kind of person (the one doing this type of work) is that he is a wicked sinner and that his faith is deficient; on the Day of Judgement, he will be under Allah's will; if Allah Almighty wills, He will forgive him; if He Almighty wills, he will punish him if he dies before repenting, this is the view of Ahlus-Sunnah wal Jama'ah. Allah Almighty says:Verily, Allah forgives not that partners should be set up with him in worship, but He forgives except that (anything else) to whom He pleases
This, though, is the ruling for someone who does not deem lawful what he is doing. If he has disbelieved. His body is not to be washed, nor is he to be prayed for. This is the opinion of all the scholars, because he is blatantly rejecting Allah Almighty and His Messenger (saws). The same ruling applies for somebody who deems lawful any act that the scholars agree as unlawful -- homosexuality, usury, fornication, killing somebody wrongfully, not being dutiful to one's parents are all examples.
When somebody perpetrates these wrongs knowing that they are wrong and knowing that he is disobeying Allah Almighty for committing these wrongs, he is not a disbeliever, but he is a wicked person; he is under Allah's will on the Day of Judgement, as we have already mentioned in case of some who drinks alcohol.
I pray this is helpful insha'Allah