The Office of Internal Affairs is under the direct supervision of the Chief of Police. Internal Affairs has oversight of all Joplin Police Department employees, which includes sworn officers, civilian staff, detention officers and dispatchers. When at full staff, the Internal Affairs Sergeant and Corporal share the responsibility of the investigations they conduct.
The Police Chaplain program currently consists of 5 volunteer Chaplains dedicated to serving the needs of Department employees and citizens experiencing difficult circumstances. The Assistant Police Chief directs the Chaplain program.