What is the ruling on a Muslim working as a guard for a nightclub that serves alcohol and involves prostitution?

Your work is forbidden, and your earnings from it are unlawful, because it involves assisting in alcohol consumption and immorality. Allah Almighty says: "{And do not cooperate in sin and aggression}." You must leave this job immediately. Remember that whoever fears Allah, He will make a way out for him and provide for him from where he does not expect. And whoever gives up something for the sake of Allah, Allah will compensate him with something better.