In Poland, he was employed at WAT (Technical Military Academy in Warsaw) as professional officer till 1968; in Switzerland, he worked at the Hauptabteilung für die Sicherheit der Kernanlagen (HSK – Swiss Federal Nuclear Safety Inspectorate).

After the end of the war, he enrolled in Polish army and studied engineering at Leningrad and Warsaw Universities, up to doctoral degree, specializing in nuclear pollution control.

He worked at WAT as professional officer (Lieutenant colonel) and reader, also developing patents, until he had to quit the position in the aftermath of the 1968-anti-semitic wave.

Two years later he was appointed at the HSK- Swiss Federal Nuclear Safety Inspectorate, at the section of radio-logical surveillance, remaining there till his retirement, in 1989.

This book was translated into English and appeared in 2007 under the title: “My Life as an ‘Aryan’: From Velyki Mosty through Zhovkva to Stralsund”, and was endorsed by Yad Vashem.

[12] The English edition documents this title as being conferred to Zofia and Jozef Piotrowski who saved Jerzy's mothernal Aunt hela Graubart and her husband Aharon.

The renown newspaper 'Neue Zürcher Zeitung' invited Czarnecki to provide a full page text for its Saturday-edition (Zeitfragen).

[16] The Foreign Ministry of the Swiss government (EDA) supported his activities of commemoration, including co-sponsoring the screening of Susy and Peter Scheiner's film in Welykie Mosty.