Soni, antara lain hadir di Forum Puisi Indonesia 1987 yang diselenggarakan DKJ, Asean Writers Conference IV 1990 di Queezon City, Filipina, Festival de Winter-nachten di Den Haag, Belanda 1999 , Puisi International Indonesia di Bandung 2002 , International Literary Biennale 2005, Living Together di Bandung 2005 .