1939: Telefunken (Berlin) 1939-1945: Peenemünde 1940s-1950s: Fort Bliss/WSPG 1950s-1950s: Redstone Arsenal 1950s-1960s: ABMA Helmut Hoelzer[5] was a Nazi Germany V-2 rocket engineer who was brought to the United States under Operation Paperclip.

[6] In October 1939, while working for the Telefunken electronics firm in Berlin, Hoelzer met with Ernst Steinhoff,[7] Hermann Steuding, and Wernher von Braun regarding guide beams for a flying body.

[Neufeld 1] In late 1940 at Peenemünde, Hoelzer was head of the guide beam division[Neufeld 2] (assistant Henry Otto Hirschler[8]), which developed a guide-plane system which alternates a transmitted signal from two antennas a short distance apart, as well as a vacuum tube mixing device (German: Mischgerät)[9] which corrected for momentum that would perturb an object that had been moved back on-track.

[Neufeld 4] Then at the beginning of 1942, Hoelzer built an analog computer to calculate and simulate[8][10][11] V-2 rocket trajectories[Neufeld 5][12] Hoelzer's team also developed the Messina telemetry system.

[1] After evacuating Peenemünde for the Alpenfestung (Alpine Fortress), Hoelzer returned to Peenemünde via motorcycle to look for portions of his PhD dissertation[5] prior to surrendering to United States forces at the end of World War II.