Question: What was the job title of this American engineer and former astronaut aboard Apollo 11, who inspired the musical Moon Landing?

<P0-S0>  The story, from an original idea and synopsis by Justin Fleming, is based on the American Space Race and the Apollo 11 spaceflight which on July 20, 1969 landed the first humans on the Moon and is seen through the eyes of Buzz Aldrin, the second man to walk on the moon. <P0-S1> Moon Landing is a musical with book, lyrics and music by Stephen Edwards. <SEP> <P1-S0> Alan LaVern Bean (born March 15, 1932), (CAPT, USN, Ret.) <P1-S1> , is an American former naval officer and Naval Aviator, aeronautical engineer, test pilot, and NASA astronaut; he was the fourth person to walk on the Moon. <P1-S2>  He was selected to become an astronaut by NASA in 1963 as part of Astronaut Group 3. <P1-S3>  He made his first flight into space aboard Apollo 12, the second manned mission to land on the Moon, at the age of thirty-seven years in November 1969. <P1-S4>  He made his second and final flight into space on the Skylab 3 mission in 1973, the second manned mission to the Skylab space station. <P1-S5>  After retiring from the United States Navy in 1975 and NASA in 1981, he pursued his interest in painting, depicting various space-related scenes and documenting his own experiences in space as well as that of his fellow Apollo program astronauts. <SEP> <P2-S0> Stainless steel commemorative plaques measuring 9 by were attached to the ladders on the descent stages of the United States Apollo Lunar Modules flown on lunar landing missions Apollo 11 through Apollo 17, to be left permanently on the lunar surface. <P2-S1>  The plaques were originally suggested and designed by NASA's head of technical services Jack Kinzler, who oversaw their production. <P2-S2>  All of the plaques bear facsimiles of the participating astronauts' signatures. <P2-S3>  For this reason, an extra plaque had to be made for Apollo 13 due to the late replacement of one crewmember. <P2-S4>  The first (Apollo 11) and last (Apollo 17) plaques bear a facsimile of the signature of Richard Nixon, President of the United States during the landings, along with references to the start and "completion" of "man's" "first" explorations of the Moon and expressions of peace for "all mankind". <P2-S5>  All, except the Apollo 12 plaque (which is also textured differently), bear pictures of the two hemispheres of Earth. <P2-S6>  Apollo 17's plaque bears a depiction of the lunar globe in addition to the Earth. <P2-S7>  The plaques used on missions 13 through 16 bear the call-sign of each mission's Lunar Module. <P2-S8>  All the plaques were left on the Moon, except the two for the aborted Apollo 13 which did not land on the Moon. <SEP> <P3-S0>  As the Lunar Module Pilot on Apollo 11, he was one of the first two humans to land on the Moon, and the second person to walk on it. <P3-S1>  He set foot on the Moon at 03:15:16 on July 21, 1969 (UTC), following mission commander Neil Armstrong. <P3-S2>  He is a former U.S. Air Force officer with the Command Pilot rating. <P3-S3>  He also went into orbit on the Gemini 12 mission, finally achieving the goals for EVA (space-walk work) that paved the way to the Moon and success for the Gemini program; he spent over five hours on EVA on that mission. <P3-S4> Buzz Aldrin (born Edwin Eugene Aldrin Jr.; January 20, 1930) is an American engineer and former astronaut.