Ernst Geissler was a German-American aerospace engineer

Aerospace engineering

Aerospace engineering is the primary branch of engineering concerned with the design, construction and science of aircraft and spacecraft. It is divided into two major and overlapping branches: aeronautical engineering and astronautical engineering...

. After World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

, he came to the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 in 16 November 1945 as part of the Argentina group, Operation Paperclip

Operation Paperclip

Operation Paperclip was the Office of Strategic Services program used to recruit the scientists of Nazi Germany for employment by the United States in the aftermath of World War II...

.

Geissler became director of the Aeroballistics Division at NASA

NASA

The National Aeronautics and Space Administration is the agency of the United States government that is responsible for the nation's civilian space program and for aeronautics and aerospace research...

's Marshall Space Flight Center

Marshall Space Flight Center

The George C. Marshall Space Flight Center is the U.S. government's civilian rocketry and spacecraft propulsion research center. The largest center of NASA, MSFC's first mission was developing the Saturn launch vehicles for the Apollo moon program...

 in 1960.

Geissler was the recipient of the The NASA Certificate of Appreciation in 1973.
He was awarded the 1973 NASA Distinguished Service Medal

NASA Distinguished Service Medal

The NASA Distinguished Service Medal is the highest award which may be bestowed by the National Aeronautics and Space Administration of the United States...

.
He was elected a Fellow of the American Astronautical Society

American Astronautical Society

Formed in 1954, the American Astronautical Society is an independent scientific and technical group in the United States dedicated to the advancement of space science and exploration. AAS supports NASA's Vision for Space Exploration and is a member of the Coalition for Space Exploration and the...

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