Exhibit 23.3

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DeGolyer and MacNaughton

5001 Spring Valley Road

Suite 800 East

Dallas, Texas 75244

April 18, 2024

Board of Directors

Ecopetrol S.A.

Carrera 13 No. 36-24

Bogota, D.C. Colombia

Ladies and Gentlemen:

We hereby consent to the references to DeGolyer and MacNaughton and to the inclusion of and information derived from our report of third party dated January 22, 2024, containing our opinions regarding our estimates, as of December 31, 2023, of the proved oil, condensate, natural gas liquids, gas, and oil equivalent reserves of certain selected properties that Ecopetrol S.A. has represented it holds in Colombia and the United States as set forth under the headings “3. Business Overview–3.5 Exploration and Production–3.5.3 Reserves,” “8. Financial Statements – 33.4 Reserve information” and “10. Exhibits” and as Exhibi No. 99.1 in the Annual Report on Form 20-F of Ecopetrol S.A. for the year ended December 31, 2023 (the Annual Report).

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