Jonathan Kiril Thomas Menkos Zeissig (born 29 June 1975) is a Guatemalan economist, politician, writer, academic and analyst serving as Guatemala's Minister of Public Finance since January 19, 2024.

[1][2] He previously served as president of the Central American Institute of Fiscal Studies (ICEFI) starting September 2012.

[3][4] On March 5, 2019, the Board of Directors of the Central American Institute of Fiscal Studies announced that Menkos requested a license to be absent from his duties as President of the Central American Institute of Fiscal Studies from March 1 to August 15, 2019.

Hours later, the political party Movimiento Semilla announced that Menkos had been elected as its vice presidential candidate and running mate of ex-attorney general Thelma Aldana,[5][6] however Aldana was disqualified from the presidential race.

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