Is it permissible to apply for a job as an Information Systems Manager in a company that operates restaurants, cafes, and bars, knowing that the nature of the work involves troubleshooting information system problems in any of the company's branches, including the bars?

If "taverns" means places where alcoholic beverages are sold, then it is not permissible to work in their information systems, due to the affirmation of evil and assisting in it. If it is possible for his work in this company to be limited to the permissible aspects, far from taverns, then the work is not forbidden. Otherwise, it is not permissible for him to work in a company that forces him to fix information system problems related to taverns.