In some cases they may retain the previous property manager on a large commercial building, otherwise they will generally have someone under contract to address these matters. The problem is finding the responsible party within the bank to issue the work order.
If you are a tenant in the building, contact the place where you send the rent payment. In some cases the work can be done by a tenant and deducted from the rent . Check the governing lease documents and your real estate attorney.
If you can contact the trustee that foreclosed, they might be able to give you the contact name.