Tandem mirror devices rely on a number of plasma heating systems to create and maintain potential and density profiles which axially confine the central cell and provide MHD stability. The Fusion Power Demonstrator (FPD) tandem mirror study was carried out in three stages, each facility was configured with a slightly different mission and set of contraints. Although the heating system requirements varied in the three stages, the potential peak and thermal barrier ECRH systems and the sloshing ion neutral beam system were common elements of the configurations. The heating systems' requirements, the design approach, and the systems' description are presented.