He is the sixth and current president of The Cartoon Network, Inc., the operating company of Cartoon Network (which includes the Cartoonito and ACME Night blocks), Adult Swim (which includes the Toonami block), and Boomerang since May 11, 2022.
He was then promoted in November 27, 2019 as interim president in addition to Turner Classic Movies, due to the departure of Christina Miller.
Discovery merger close, Tom Ascheim departed the company, and the divisions under The Cartoon Network, Inc. (Cartoon Network, Adult Swim, and Boomerang) were moved into Warner Bros.
Discovery Networks U.S., with Ouweleen regaining oversight of the company after one year and ten months.
[4] In June 2023, Ouweleen gained the Business side of TCM,[5] following another wave of layoffs at the Television part of Warner Bros.