Along with his college friend Jaap Reesema and Titus van Dijk, he co-founded the production company Tonny Media, which produces podcasts including the Zelfspodcast.

After finishing his studies Schimmelpenninck worked for three years as a trainee lawyer at the Houthoff Buruma law firm on the Zuidas in Amsterdam.

In 2019 Schimmelpenninck started a podcast called the Zelfspodcast together with Reesema, in which they discuss their daily lives based on different topics per episode.

In addition to his work on Op1, Schimmelpenninck made a season of Dragons' Den on NPO 1 from April 2020, in which aspiring entrepreneurs pitch their own businesses to a group of investors.

[10] Together with Thomas Erdbrink, Northern Europe correspondent for The New York Times, Schimmelpenninck made a one-time special in 2020 about the Swedish approach to the Coronavirus pandemic: Zweden doen het anders (Sweden does it differently).