In 1999/2000, Ott created the full-length music theatre cycle ojota I-IV.
In 2000 he wrote klangkörperklang - music for the Swiss Pavilion Expo 2000 Hannover [de] by Peter Zumthor.
This was followed by landscape compositions for the harbour Sassnitz/Rügen (2002), the place of pilgrimage Heiligkreuz/Entlebuch (2003), the river Neisse between Görlitz and Zgorzelec (2005) and the Rhine port of Basel (2006).
From 1995 to 2004, Ott held a teaching position for experimental music at the Universität der Künste Berlin, where he founded the KlangKunstBühne summer academy in 2003.
[2] In 2016, Ott took over the artistic direction of the Munich Biennale together with the composer Manos Tsangaris (successor to Peter Ruzicka).