SS under Himmler as Reichsführer SS and an office in the Ministry of the Interior under Himmler as Chief of the German Police. The internal structure of the RSHA shows the manner in which it consolidated the offices of the Security Police with those of the SD. The RSHA was divided into seven offices (Ämter), two of which (Amt I and Amt II) dealt with administrative matters. The Security Police wore represented by Amt IV, the head office of the Gestapo, and by Amt V, the head office of the Criminal Police. The SD were represented by Amt III, the head office for SD activities inside Germany, by Amt VI, the head office for SD activities outside of Germany and by Amt VII, the office for ideological research. Shortly after the creation of the RSHA, in November 1939, the Security Police was "coordinated" with the SS by taking all officials of the Gestapo and Criminal Police into the SS at ranks equivalent to their positions.

The creation of the RSHA represented the formalization, at the top level, of the relationship under which the SD served as the intelligence agency for the Security Police. A similar coordination existed in the local offices. Within Germany and areas which were incorporated within the Reich for the purpose of civil administration, local offices of the Gestapo, Criminal Police, and SD were formally separate. They were subject to coordination by Inspectors of the Security Police and SD on the staff's of the local Higher SS and Police Leaders, however, and one of the principal functions of the local SD units was to serve as the intelligence agency for the local Gestapo units. In the occupied territories, the formal relationship between local units of the Gestapo, Criminal Police, and SD was slightly closer. They were organized into local units of the Security Police and SD and were under the control of both the RSHA and of the Higher SS and Police Leader who was appointed by Himmler to serve on the staff of the occupying authority. The offices of the Security Police and SD in occupied territory were composed of departments corresponding to the various Amts of the RSHA. In occupied territories which were still considered to be operational military areas or where German control had not been formally established, the organization of the Security Police and SD was only slightly changed. Members of the Gestapo, Kripo, and SD were joined together into military type organizations known as Einsatz Kommandos and Einsatzgruppen in which the key positions were held by members of the Gestapo, Kripo, and SD and in which members of the Order Police, the Waffen SS and even the Wehrmacht were used as auxiliaries. These organizations were under the over-all control of the RSHA, but in front line areas were under the operational control of the appropriate Army Commander.