Mid-level managers are the key to all diversity goals. They are the gatekeepers to the everyday comings and goings of any organization, and if they don’t feel that their lack of interest in a fair and just work environment will have personal consequences, then they will continue on “business as usual.” This has been my experience in all of the companies that I have worked at.
There should also be an independent local committee made up of various staff to address diversity concerns. HR Departments are for the most part useless in making sure management is held accountable for systemic racism. They will only discipline a manager if there is an obvious smoking gun, but we all know that subtle racism is how racist management continue to fly under the radar.