Exhibit 23.3

	TBPE REGISTERED ENGINEERING FIRM F-1580		FAX (713) 651-0849
	1100 LOUISIANA STREET    SUITE 4600	HOUSTON, TEXAS 77002-5294	TELEPHONE (713) 651-9191

CONSENT OF INDEPENDENT PETROLEUM ENGINEERS

Ryder Scott Company, L.P. (“Ryder Scott”) consents to the references to our firm and our report dated February 19, 2018 (our “Report”) included in Ecopetrol S.A.’s annual report on Form 20-F for the year ended December 31, 2017 (the ”Annual Report”), the inclusion of our Report as Exhibit 99.1 to the Annual Report and references to and information derived from our Report in the Annual Report, as well as to the incorporation by reference of our Report into Ecopetrol’s S.A.’s registration statement on Form F-3 filed with the United States Securities and Exchange Commission on or about June 1, 2018 (the “Registration Statement”). Ryder Scott further consents to the references to Ryder Scott as set forth in the Registration Statement under the heading “Experts”.

	/s/ RYDER SCOTT COMPANY, L.P.
	RYDER SCOTT COMPANY, L.P.
	TBPE Firm Registration No. F-1580
Houston, Texas
June 1, 2018

SUITE  600,  1015  4TH  STREET, S.W.	CALGARY, ALBERTA T2R 1J4	TEL (403) 262-2799	FAX (403) 262-2790
621  17TH STREET, SUITE 1550	DENVER, COLORADO 80293-1501	TEL (303) 623-9147	FAX (303) 623-4258