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Guillermo Nielsen

b. 1951

Argentine economist

Economist
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About Guillermo Nielsen

Born 1951. Guillermo Nielsen is an Argentine economist.

Guillermo Nielsen (born 20 April 1951) is an Argentinian economist who was president of the State-owned oil company YPF from 2019 to 2021. He also served as Ambassador of Argentina in Germany designated by President Cristina Fernández de Kirchner between 2008 and 2010. Since 2024, he is the Argentine ambassador to Paraguay.

Nielsen earned a degree in economics from the University of Buenos Aires and an M.A. in economics from Boston University, where he was a Ph.D. candidate. During the presidencies of Néstor Kirchner and Eduardo Duhalde, Nielsen served as Secretary of Finance from May 2002 to December 2005, working with Economy Minister Roberto Lavagna on the Argentine debt restructuring and leading negotiations for two stand-by agreements with the International Monetary Fund.

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Important facts

Born
20 April 1951, Buenos Aires
Birth century
20th century
Occupation
Economist
Nationality
Argentina
Education
University of Buenos Aires
Employers
YPF

People in Guillermo Nielsen's life

Named in this biography and alive at the same time

Portrait of Cristina Fernández de Kirchner
Cristina Fernández de Kirchner
b. 1953
Lawyer
 Portrait of Eduardo Duhalde
Eduardo Duhalde
b. 1941
Lawyer
 Portrait of Néstor Kirchner
Néstor Kirchner
1950 – 2010
Lawyer
 Portrait of Roberto Lavagna
Roberto Lavagna
b. 1942
Economist

Contemporaries

People whose lives overlapped Guillermo Nielsen's

Portrait of Garrett Birkhoff
Garrett Birkhoff
1911 – 1996
Mathematician
 Portrait of George Szekeres
George Szekeres
1911 – 2005
Mathematician
 Portrait of John Archibald Wheeler
John Archibald Wheeler
1911 – 2008
Physicist
 Portrait of Luis Walter Alvarez
Luis Walter Alvarez
1911 – 1988
Physicist
 Portrait of Qian Xuesen
Qian Xuesen
1911 – 2009
Astronautical engineer
 Portrait of Josephine Barnes
Josephine Barnes
1912 – 1999
Gynecologist

Frequently asked questions

Who is Guillermo Nielsen?

Argentine economist

When was Guillermo Nielsen born?

Guillermo Nielsen was born on 20 April 1951 in Buenos Aires.

What is Guillermo Nielsen's occupation?

Guillermo Nielsen is an economist.

What nationality is Guillermo Nielsen?

Guillermo Nielsen is Argentine.

Sources & further reading

· Wikipedia: Guillermo Nielsen

· Wikidata: Q20016422

· DBpedia: Guillermo Nielsen

Cite this page

APA: Biography.guide. (2026). Guillermo Nielsen. https://biography.guide/guillermo-nielsen/

MLA: "Guillermo Nielsen." Biography.guide, https://biography.guide/guillermo-nielsen/.

Chicago: "Guillermo Nielsen." Biography.guide. https://biography.guide/guillermo-nielsen/.

Data last updated: 2026-09-24 · Spot an error? Report a correction.

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