Franklin Vincent Reno was a mathematician and civilian employee at the United States Army

United States Army

The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

 Aberdeen Proving Ground in Maryland in the 1930s. Reno was a member of the "Karl group" of Soviet spies which was being handled by Whittaker Chambers

Whittaker Chambers

Whittaker Chambers was born Jay Vivian Chambers and also known as David Whittaker Chambers , was an American writer and editor. After being a Communist Party USA member and Soviet spy, he later renounced communism and became an outspoken opponent later testifying in the perjury and espionage trial...

 up until 1938. Reno confessed in late 1948 to his espionage activities on behalf of the GRU

GRU

GRU or Glavnoye Razvedyvatel'noye Upravleniye is the foreign military intelligence directorate of the General Staff of the Armed Forces of the Russian Federation...

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He is listed as number "118th" in the Gorsky Memo.

Source

• Alexander Vassiliev, Untitled Notes on Anatoly Gorsky’s December 1948 Memo on the Failed American Networks (2003)