 Subsequently, Simaku's works have been selected by the International Jury at the World Music Days of 1999, 2000, 2001, 2003, 2004, 2005, 2006, and 2012.Other international festivals where his music has been performed include
Music Biennale Zagreb, Tanglewood, Avignon, Miami, Cagliari, KlangSpectrum (Austria), Viitasaari (Finland), Innsbruck (Austria), Odense (Denmark), Manchester, York, Birmingham, Automne de Tirana amongst others.In October 2013, Simaku was invited to give a lecture at the 5th Pharos International Contemporary Music Festival in Nicosia, Cyprus, on the genesis and processes involved in his "Soliloquy" Cycle.