Exhibit 23.9

CAWLEY, GILLESPIE & ASSOCIATES, INC.

PETROLEUM CONSULTANTS

13640 BRIARWICK DRIVE, SUITE 100	306 WEST SEVENTH STREET, SUITE 302	1000 LOUISIANA STREET, SUITE 1900
AUSTIN, TEXAS 78729	FORT WORTH, TEXAS 76102-4987	HOUSTON, TEXAS 77002-5008
512-249-7000	817- 336-2461	713-651-9944
	www.cgaus.com

As independent petroleum engineers, we hereby consent to the inclusion in Magnolia Oil & Gas Corporation’s Registration Statement on Form S-8 (the “Registration Statement”), of our reserves reports of Magnolia Oil & Gas Corporation’s proved oil and natural gas reserves estimates and associated estimates of future net revenues and their present value as of December 31, 2017, included in or made a part of the Registration Statement.

CAWLEY, GILLESPIE & ASSOCIATES, INC.

Texas Registered Engineering Firm

/s/ W. Todd Brooker

W. Todd Brooker, P.E.

President

Houston, Texas

October 5, 2018