Johannes Max Clemens was a German functionary of respectively the SS

Schutzstaffel

The Schutzstaffel |Sig runes]]) was a major paramilitary organization under Adolf Hitler and the Nazi Party. Built upon the Nazi ideology, the SS under Heinrich Himmler's command was responsible for many of the crimes against humanity during World War II...

, Sicherheitsdienst

Sicherheitsdienst

Sicherheitsdienst , full title Sicherheitsdienst des Reichsführers-SS, or SD, was the intelligence agency of the SS and the Nazi Party in Nazi Germany. The organization was the first Nazi Party intelligence organization to be established and was often considered a "sister organization" with the...

(SD, Security Service) was primarily the intelligence service of the SS and the Nazi Party in Nazi Germany. Perhaps he is the same that Viktor Klemperer defines as "animal" in his diaries and that answered to a victim of his brutality who asked him "why do you hate me so much?", "Simply because you are jew". Then he participated to the Gehlen Organization

Gehlen Organization

Gehlen Organization was an intelligence agency established in June 1946 by U.S. occupation authorities in the United States Zone of Germany, and consisted of former members of the 12th Department of the Army General Staff...

 and Bundesnachrichtendienst

Bundesnachrichtendienst

The Bundesnachrichtendienst [ˌbʊndəsˈnaːχʁɪçtnˌdiːnst] is the foreign intelligence agency of Germany, directly subordinated to the Chancellor's Office. Its headquarters are in Pullach near Munich, and Berlin . The BND has 300 locations in Germany and foreign countries...

(Bundesnachrichtendienst (Federal Intelligence Service, BND) is the foreign intelligence agency of the modern German government, under the control of the Chancellor's Office), and finally h e made his job for the KGB

KGB

The KGB was the commonly used acronym for the . It was the national security agency of the Soviet Union from 1954 until 1991, and was the premier internal security, intelligence, and secret police organization during that time.The State Security Agency of the Republic of Belarus currently uses the...

 (the KGB was the national security agency of the USSR).

Clemens was part of a group of Soviet spies that were put on trial in 1963. His co-defendants were Heinz Felfe

Heinz Felfe

Heinz Paul Johann Felfe was a German national who was a former SS Obersturmführer , who worked for the Bundesnachrichtendienst , after the Second World...

 and Erwin Tiebel. Clemens received a 10-years sentence for treason.