He was born in Piraeus/Greece (1956) and studied Physics at the University of Thessaloniki. Right after he begun studying saxophone and music theory, as a result of an ongoing interest in afroamerican music and free improvisation. At 1986 he moved to Paris, with the help of a scholarship by the French State, where he pursued studies in Electroacoustic Music at the Université Paris VIII with H.Vaggione and worked as composer in residence at the studio La Muse En Circuit of Luc Ferrari. From 1988 he lived in Oakland, California, where has completed an M.F.A. in Electronic Music and Recording Media at Mills College having studied among others David Rosenboom, Gordon Mumma, Robert Ashley and Anthony Braxton. In Greece, after 1991, he works as a musician, sound engineer and educator. Since 1995 he lives in Corfu where he teaches at the Music Department of Ionian University, now as Associate Professor of Electronic Music Composition and where he directs the Electroacoustic Music Research Laboratory (ΕΡΗΜΕΕ) which is active in a variety of research and educational projects such as the Graduate Program on Sonic Arts and Technologies and the Summer Seminars in Electroacoustic Music (2004-2010), the Corfu Soundscape Project (2006/7), the Hellenic Electroacoustic Music Days (many times), various Symposia on Acoustic Ecology including the International World Forum for Acoustic Ecology Conference of 2011 etc. Both the Hellenic Association of Electroacoustic Music Composers and the the Hellenic Society of Acoustic Ecology are the result of some of these activities. Mr. Mniestris is a founding member in both and he has served on their Board of Directors for many years.