Johannes Max Clemens (February 9, 1902 — 1976) was a German functionary of respectively the SS, Sicherheitsdienst (SD, Security Service) was primarily the intelligence service of the SS and the Nazi Party in Nazi Germany. Clemens was also known as the Tiger of Como while serving as a captain in the SS.
Then he joined the Gehlen Organization and with Heinz Felfe, began feeding information to the Soviets. Before this work was discovered, he worked with the successor of the Gehlen Org, the Bundesnachrichtendienst (Bundesnachrichtendienst (Federal Intelligence Service, BND), the foreign intelligence agency of the modern German government, under the control of the Chancellor's Office).
Clemens was part of a group of Soviet spies that were put on trial in 1963. His co-defendants were Heinz Felfe and Erwin Tiebel. Clemens and Felfe admitted to having transmitted great amounts of secret information to the Soviets, including 15,000 classified documents. All three were convicted, with Clemens receiving a 10-years sentence for treason.