Custom CMS

Please read the requirement carefully, and only share relevant work. I need a CMS which will be used to keep track of cases. The CMS will be web based, i.e there will be a module for the admin to add users and their roles along with usernames and passwords. When the users login the first time, they will be required to change their password. There will be different levels of users. Each level of position is in the hierarchy i.e the highest position has access to all the cases, the texas manager only has access to cases in texas. Only some positions can create a case and assign it to someone to work on. There will be automatic email notifications when certain things happen. Reports will be created about various things including cases per region/city etc or money spent etc, or cases open etc. Reports can only be access by hierarchy. There will be the following modules: resources, board, rules, human resources, login info, case. More details will be provided once I find the right bidder. Note: in the system, your name or your company's name should not be present anywhere.