Born in Redwood City on the San Francisco Bay in California, he worked for 15 years at the Hoover Institution at Stanford University, including as an archivist for exhibitions and public relations.

Since 2017, he has worked as a Polish-English translator and English teacher. He spent nearly a decade of his life in Poland. His translations include Jerzy Kwiatkowski’s camp memoirs 485 Days at Majdanek published by Hoover Institution Press. In 2022, he obtained a Ph.D. from the Tadeusz Manteuffel Institute of History of the Polish Academy of Sciences in Warsaw. He wrote his doctoral dissertation on American aid to Poland after it regained independence in 1919 under the supervision of Herbert Hoover.

Dr. Siekierski’s interests include Polish-American relations, American politics, historical policy, and the history of the twentieth century, including the history of World War II and its effects on America and Poland.