His experiential work includes cooperations with the British band These New Puritans, with jazz musician Uri Caine and composers Nico Muhly and Owen Pallett. There is also a close relation with Cologne-based MusikFabrik and with the electronic duo Mouse on Mars as well as collaboration with Efterklang. In 2012, de Ridder founded stargaze, a musical collective devoted to crossing borders between classical, pop, folk, electronic and 'uncategorizable' music. Together with this group he has performed in London, Manchester, Paris, Amsterdam, New York and Sydney, and has launched its own spring festival in Berlin.
In the field of opera, de Ridder has conducted among others works by Mozart, Leoš Janáček and Hans Werner Henze. He conducted several world premieres:
De Ridder is the co-curator and conductor of Unclassified Live, a series of genre-defying concerts at the Southbank Centre based on the BBC Radio 3 programme.[2]
In February 2021, it was announced that he has been nominated as GMD elect of Theater Freiburg and Philharmonisches Orchester, starting September 2022.
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De Ridder conducted with discerning pace and gave the music space to breathe. [...] Energy, taste and a discriminating ear for balance and timbre are hallmarks of his conducting.
— Geoffrey Norris, The Telegraph, February 22, 2008