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Josef Frolík

1928 – 1989

1969 Czechoslovak spy

Spy
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About Josef Frolík

Lived 1928 – 1989 (aged 60). Josef Frolík was a Czech spy.

Josef Frolík (September 22, 1928 – May 1989) was a Czechoslovak spy who, in 1969, defected to the United States and joined the CIA.

Childhood Josef Frolík was born in Libušín, Czechoslovakia. He graduated from secondary school at the end of World War II. After the war he studied at the business academy in Slaný and worked as an accountant for the state-owned communist newspaper Rudé právo.

Secret Service Whilst serving his mandatory two years service in the Czechoslovak People's Army Frolík discovered that some officers of the 2nd Infantry Regiment had stolen a small fortune in jewels and paintings. He reported this to the Third Directorate of Counter Intelligence in Prague and was then recruited into the State Security as a 1st Sergeant in the Finance Directorate. He moved on to counter intelligence and from 1964 to 1966 worked as a spy in London under the guise of a diplomat in the Czechoslovak embassy. He was recalled back to Czechoslovakia and in 1969 he managed to gather as many state secrets as he could and escaped to the west, defecting to the CIA.

Emigration After defecting to the West, he wrote a book in which he recalled his life and work for the StB and detailed his defection. The Czechoslovak government sentenced him to death in absentia. In 1987, he was diagnosed with cancer and died in May 1989.

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Important facts

Birth century
Occupation
Spy
Nationality

Contemporaries

People whose lives overlapped Josef Frolík's

Frequently asked questions

Who was Josef Frolík?

1969 Czechoslovak spy (1928–1989)

When was Josef Frolík born?

Josef Frolík was born on 22 September 1928 in Libušín.

When did Josef Frolík die?

Josef Frolík died on 11 May 1989 in Florida.

What was Josef Frolík's occupation?

Josef Frolík was a spy.

What nationality was Josef Frolík?

Josef Frolík was Czech.

Sources & further reading

· Wikipedia: Josef Frolík

· Wikidata: Q12026016

· DBpedia: Josef Frolík

Cite this page

APA: Biography.guide. (2026). Josef Frolík. https://biography.guide/josef-frolik/

MLA: "Josef Frolík." Biography.guide, https://biography.guide/josef-frolik/.

Chicago: "Josef Frolík." Biography.guide. https://biography.guide/josef-frolik/.

Data last updated: 2026-09-23 · Spot an error? Report a correction.

Portrait: Wikimedia Commons · author & licence

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