In 1960, Petrone was seconded to NASA. There, Petrone presided over the development of Saturn V launch operations, dubbing the period of preparation leading up to each launch "five-month marathons". He oversaw construction of all the launch elements of the Apollo program at Kennedy Space Center, including Launch Complex 39, the Vertical Assembly Building, and the Crawler-Transporter, all of which were later modified for Space Shuttle operations. After his retirement from the U.S. Army in 1966 he continued to work for NASA as a civilian, being promoted to director of launch operations at KSC in July 1966. In September 1969, shortly after the Apollo 11 mission, he was appointed director of the entire Apollo program at NASA Headquarters. In 1972, Petrone was assigned additional responsibilities as program director of the NASA portion of the U.S. and the Soviet Union joint Apollo-Soyuz Test Project. talk during preparations for the A-104 Saturn 1 launch at LC-37 From 1973 to 1974, Petrone served for one year as the first non-German administrator of the Marshall Space Flight Center, after Wernher von Braun and Eberhard Rees. At the time NASA was undergoing budget cutbacks, and his tenure was marked with many reassignments or firings. In 1974, Petrone left the Marshall Center to accept an appointment at NASA Headquarters, assuming the post of NASA Associate Administrator, the third-highest ranking official within the agency.
After NASA
In 1975, Petrone retired from NASA and became the president and chief executive officer of the National Center for Resource Recovery, a joint industry/labor effort to develop and encourage ways to recover materials and energy from solid waste. In the 1980s, Petrone held senior posts at Rockwell International, manufacturer of the Space Shuttle Orbiter. He eventually rose to become head of Rockwell's space transportation division. On the morning that the Space Shuttle Challenger was due to launch on STS-51-L, Petrone and several of his colleagues were alarmed at the massive amount of ice that had built up overnight on the Orbiter due to unseasonably cold temperatures. Petrone feared that the ice could seriously damage the shuttle's thermal protection system when it struck the tiles during launch. He told his managers at Cape Canaveral that Rockwell could not support launching because it viewed the amount of ice on the Orbiter as a launch constraint. This was not the cause, however, of the launch failure that killed seven astronauts. Petrone died on August 24, 2006 from complications related to diabetes in Palos Verdes Estates, California, aged 80.
Character
Petrone was described as demanding by his NASA colleagues. Humboldt C. Mandell, Jr. said that once: In a similar vein, Noel Hinners related the following: