Answer
Heydrich, as the Chief of the Reich Security Main Office (RSHA), was a central figure in the Nazi security apparatus. The RSHA, established in 1939, consolidated various intelligence and security agencies, including the Gestapo, Kripo, and SD, under Heydrich's leadership. Through the RSHA, Heydrich oversaw the persecution of Jews and other minorities, suppression of political dissent, and coordination of intelligence operations throughout Nazi Germany.