Carl Groos Jockusch Jr. (born July 13, 1941, in San Antonio, Texas) is an American mathematician.

[1] He graduated from Alamo Heights High School in 1959, attended Vanderbilt University in Nashville, Tennessee, and transferred to Swarthmore College, Pennsylvania in 1960, where he received his B.A.

He is a member of Phi Beta Kappa and Sigma Xi.

In 1972 Jockusch and Robert I. Soare proved the low basis theorem, an important result in mathematical logic with applications to recursion theory and reverse mathematics.

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