Is it permissible to accept a job as a department manager in a restaurant that sells non-halal food?

Working in a restaurant that sells forbidden items is unlawful, even if the person does not directly engage in selling, because it is considered aiding in sin. Allah Almighty says: {And cooperate in righteousness and piety, but do not cooperate in sin and aggression.} Just as Allah has forbidden disobedience upon us, He has also forbidden us from aiding the disobedient in their disobedience.