Passing away on June 3rd, 2018, Georg von Tiesenhausen was the last of the original German rocket scientists that came to the United States with Wernher von Braun.

He is also presumably responsible for #29 and #30 of Akin's Laws of Spacecraft Design:

29. (von Tiesenhausen's Law of Program Management) To get an accurate estimate of final program requirements, multiply the initial time estimates by pi, and slide the decimal point on the cost estimates one place to the right.

30. (von Tiesenhausen's Law of Engineering Design) If you want to have a maximum effect on the design of a new engineering system, learn to draw. Engineers always wind up designing the vehicle to look like the initial artist's concept.