He was an editor involved in The Scream of the Lion (VARA) with Paul de Leeuw, Sonja on Saturday (VARA) with Sonja Barend and Rolling Fire (NOS) with Philip Freriks and Leoni Jansen.

On 29 June 2010 Maas announced he would not be commenting at The 56th Eurovision Song Contest in Düsseldorf, Germany.

[1] Maas' replacements were his co-host at the 2010 Eurovision Song Contest Daniël Dekker and Dutch singer Jan Smit.

On 31 August 2019, Maas was named creative advisor for the Eurovision Song Contest 2020 in Rotterdam.

[2] He has since continued to be part of the selection committee for the Dutch entry to the Eurovision Song Contest 2022 and subsequent years.