In 2019, Jort Kelder became a co-host of 'Op1', a prominent Dutch talk show broadcast on NPO 1. The program features discussions on current affairs, politics, and culture, with Kelder bringing his sharp interviewing skills and dynamic presence to the show. 'Op1' has become a key platform for public debate in the Netherlands.

In 2014, Jort Kelder began presenting 'Dr. Kelder en Co', a radio program on NPO Radio 1. The show features discussions with experts on various topics, ranging from science to politics, providing listeners with in-depth analysis and insights. Kelder's engaging style has made the program a success.

Jort Kelder took on the role of host for the radio program 'Kelder & Co' on BNR Nieuwsradio in 2010. The show focused on economic and political issues, allowing Kelder to delve into complex topics with his characteristic analytical approach. His presence on the program attracted a dedicated audience.

In 2008, Jort Kelder began presenting the television program 'Hoe Heurt Het Eigenlijk?' on AVROTROS. The show explored Dutch etiquette and high society, showcasing Kelder's flair for engaging storytelling and his interest in the cultural norms of the elite. The program became a popular fixture on Dutch television.

After eight years as editor-in-chief, Jort Kelder left Quote in 2007. His departure marked the end of an era for the magazine, which had become known for its fearless reporting and Kelder's distinctive editorial voice. Kelder's leadership had significantly shaped the magazine's identity and impact.

In 1999, Jort Kelder became the editor-in-chief of Quote, a prominent Dutch business magazine. Under his leadership, the magazine gained a reputation for its investigative journalism and bold coverage of the Dutch business elite. Kelder's tenure at Quote marked a significant period of growth and influence for the publication.