Born in Akron, Ohio, Dennis K. Sullivan II is a percussionist, composer, electronicist and educator based in Queens NY.

As a percussionist focusing on new and contemporary music, Dennis is a founding member of the performance duo, Radical 2 with percussionist/electronics engineer, Levy Lorenzo. A classification-defying duo that explores the use of theatric, vocal, percussive and prototype electronic mediums, Radical 2 has been bringing this unique blend to contemporary audiences for over five years. Radical 2 was featured on the 2017 OpenICE series at the Abrons Arts Center, 2016 Omaha Under the Radar festival and also has been heard in New York, Chicago, San Francisco, Berlin, London, Hamburg and elsewhere. They have held residencies at Stanford University and Adelphi University.

He is also one half of Popebama, a high octane experimental percussion/saxophone duo with composer/saxophonist Erin Rogers. They have been featured on the 2017 Edmonton Fringe Festival, 2017 New Music Gathering, Permutations, Home Audio and Park City's VU Symposium. 2017-18 season highlights will include world premieres from Andrew Greenwald, Jenna Lyle, Daniel Silliman, Erin Rogers and Dennis himself as well as an appearance at the 2018 SPLICE Festival at Western Michigan University.

2017 saw the birth of a new performance collective, SLOW, with trombonist/composer/sound artist Weston Olencki. Their debut performance featured an original arrangement of Mauricio Pauly's The Threshing Floor as well as the world premiere of Dennis's Ashen Clearing which brought pianist Eric Wubbles into the fold. 2017-18 season highlights will feature new collaborations including a concert with Maurcio Pauly of his works.

Dennis is as well very active as a solo artist in the US and Europe, commissioning new works for his unique hybrid of percussion, theater, and electronics as well as actively performing his own compositions. As a composer, Dennis’s work has been heard in the US, Canada, Germany, and the Netherlands. His music explores cross-genre coalescence between acoustic, electronic and timbral based noise music. His compositions examine sounds through a very small aperture, zooming in to focus on the unheard sounds within a sounds, drawing attention to the sonic consequences that are always present but not always heard. He crawls inside of each instrument to find every pitch in the spectrum and every small consequence of the physical action that goes into producing sound. By connecting and combining often discordant states, he attempts to create a feel of interconnectivity that divulges underlying qualities of continuity and unity He has been awarded a composition residency at the STEIM center for electro acoustic music in Amsterdam. His music has been been performed by HYPERCUBE, Popebama, Radical 2 and flutist Anne Dearth. Upcoming performances include a new commission from the New Thread Saxophone Quartet, a new work for Popebama as well as a revised version of Ashen Clearing with Weston Olencki and Eric Wubbles.

Dennis was been awarded the grand prize at the Van Rooy Competition for Musical Excellence, and has received the Stipiendienpreise at the Darmstadt International Ferienkurse fur Neue Musik (Darmstadt, Germany). His festival appearances have included Darmstadt, NIME 2014 at Goldsmith’s University (featured soloist), OpenICE, The Edmonton Fringe Festival, The Ecstatic Music Festival,The Klangspuren Festival (Ensemble Modern Academy), Omaha Under the Radar, ACA Festival of American Music, Make Music New York, and the Woodstock Fringe Festival. He has recorded for the New Amsterdam, Mode and Original Abstraction labels. He has shared the stage with leading contemporary music ensembles such as The Argento Ensemble, Either/Or, The International Contemporary Ensemble (ICE), Ensemble Pamplemousse, Newband, Iktus Percussion, Mivos, The Darmstadt Preistrager Forum, Ensemble Modern Academy, and many more. He has performed in leading NYC venues such as BAM, Roulette, Merkin Hall, Miller Theater, Symphony Space, The Stone, The Cell, The Tank, The Firehouse Space and JACK where he has successfully curated a yearly series of theatrically driven new music, bringing together classical music, theater, rock, heavy metal, and film all under the umbrella of "theatrically driven art."

Dennis holds a Bachelor of Music (BM) from the Hartt School of Music as well as Master of Music (MM) and Doctorate of Musical Arts (DMA) from SUNY Stony Brook University. Dennis currently serves as adjunct professor of percussion as well as the director of the wind ensemble at Adelphi University