An active chamber and orchestral percussionist, Dennis Sullivan has shared the stage with leading contemporary music ensembles such as The Argento New Music Project, Either/Or, The International Contemporary Ensemble, ECCE Ensemble, Ensemble Court Circuit (Paris), Ensemble Pamplemousse, Wavefield Ensemble, Newband, Thump & Wail, Mivos Quartet, The Darmstadt Preistrager Forum, and Ensemble Modern Academy.