Charles Herzfeld was born in Vienna to an assimilated (even catholic) Jewish Family, the son of August Herzfeld and nephew of physicist Karl Herzfeld.

He holds an engineering degree from the Catholic University of America (B.S., 1945) and one in physical chemistry from the University of Chicago (Ph.D., 1951). He worked as a physicist at the Ballistic Research Laboratory, Aberdeen, Maryland from 1951 to 1953, and at the Naval Research Laboratory in Washington from 1953 to 1955.

After several years with the National Bureau of Standards, he became Assistant Director of the Advanced Research Project Agency (ARPA) of the Department of Defense. He was Director of ARPA from 1965 to 1967, and was instrumental in setting up the ARPAnet:

"In February, 1966, Taylor approached the then head of ARPA, Charles Herzfeld, and made a proposal for the creation of an interactive computer network, linking different computer systems together for the sharing of information. After a twenty-minute discussion with Taylor describing this proposal, Herzfeld approved of Taylor's concept and provided $1 million in initial project funds ...

A google search in domain .at renders 3 links.

I could not find a full biography on the web.
Here's an oral history interview with Mr. Herzfeld from the Charles Babbage Institute.

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