Anderegg was was born in 1924 in Philadelphia He grew up in Colonia, NJ. His father had served in the American Expeditionary Forces in France in WW1, immediately after his graduation from Cornell, and his grandfather, born in Switzerland, had been a professor at Oberlin.
He attended MIT but did not finish his degree before leaving to join the Army.
He served in the 3133rd Signal Company Special, which operated as an independent sonic deception unit in Italy in 1945.
When he came home from Europe he used the GI Bill to study shorthand for a year at a secretarial school so he could take better and more complete notes when he returned to MIT! Graduated from MIT in 1949.
He was an "intuitive mechanic," a traveling salesman for American Wire, an engineer with Draper Labs, and an open wheel auto racing enthusiast. Later in life he also studied blacksmithing in North Carolina.
In 1955 he was one of the founders of Dynamics Research Corp, a technology/management consulting firm in Massachusetts, primarily serving the Department of Defense, and other government agencies). He served as President and Chairman from 1955-1986.
He married Hope Ingersoll in 1959 and they had 3 children. They lived primarily in Carlisle, Massachusetts, and he was active in Republican politics.
After her death he married Frances Garland, and retired with her to Buzzards Bay. He died at home on August 5, 2015.
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