Hans Vonk
Sparnaay was a featured performer with many major orchestras and ensembles including the ASKO Ensemble, BBC Symphony Orchestra, Berlin Radio Symphony Orchestra, Concertgebouw Orchestra, Ensemble Intercontemporain, Melbourne Symphony, Pittsburgh New Music Ensemble, Netherlands Radio Chamber Philharmonic, Radio Filharmonisch Orkest, Residentie Orchestra, Rotterdam Philharmonic, Schönberg Ensemble, Seymour Group and has appeared with leading conductors including Luciano Berio, Riccardo Chailly, Richard Duffalo, Peter Eötvös, Reinbert de Leeuw, Diego Masson, Jacques Mercier, David Porcelijn, David Stock, Mark Summerbell, Lucas Vis and Hans Vonk.