Sungji Hong’s music has been described as “a work of iridescent freshness” (BBC Music Magazine), “the sound is utterly luminous” (Fanfare Magazine), “outbursts of rhythmic energy” (The Irish Times), and "a virtuoso exploration of the technical and sonorous possibilities” (Daily Telegraph).

Her creative output ranges from works for solo instruments to full orchestra, as well as choral, ballet and electroacoustic music. Her works have been commissioned by the Fromm Music Foundation (Harvard University, USA), the Tongyoung International Music Festival (Korea), the Seoul Philharmonic Orchestra (Korea), the Keumho Asiana Cultural Foundation (Korea), the International Isang Yun Music Society (Germany), the MATA Festival (USA), and National Flute Association (USA).

Over the last decade, Sungji's music has been performed by leading players and ensembles in over 44 countries and 204 cities at such venues as the Carnegie Hall (New York), the Kennedy Center (Washington DC), the Merkin Hall (New York), the Herbst Theatre (San Francisco), the Gewandhaus (Leipzig), the Konzerthaus (Berlin), the Flagey (Brussels), the Queen Elizabeth Hall (London), Temple Church (London), Athens Concert Hall (Athens), the Muziekgebouw (Amsterdam), the Cantacuzino Palace (Bucharest) and the National Theatre 'Opera and Ballet' (Ljubljana).

Her music has been widely broadcast in more than 17 countries (37 channels including BBC Radio 3, SWR 2, DLF, MDR FIGARO, WNYC 2, RDP-Antena 2, HRT 3, ERT, YLE Radio 1, ABC CLASSIC FM and others) and has been recorded and released on the Soundbrush, Elektramusic, Atoll, Dutton label and by ECM Records. Her music is published by Da Vinci Edition, SEEMSA and Tetractys Publishing.

She has won Franz Josef Reinl-Stiftung (1st Prize), Magistralia (1st Prize), Ilshin Composition Prize (1st Prize), In Nova Musica Competition (1st Prize), the Jesus Villa Rojo (1st Prize), the European Competition of the State Conservatory of Thessaloniki (1st Prize), the Temple Music Composition Prize (1st Prize), the Crwth Competition (1st Prize), the international competition for original ballet music at the ISCM World Music Days – Slovenia (1st Prize), the Montserrat International Camera Music Composition Competition (1st Prize), the Salvatore Martirano Composition Competition (2nd Prize), the Dimitris Mitropoulos International Competition (2nd Prize), the Theodore Front Prize (IAWM), the Yoshiro Irino Memorial Prize (ACL), the Christian Fellowship of Art Music Composers Scholarship, and several other prizes and awards.

She studied composition at the Hanyang University in Seoul and subsequently completed her MMus at the Royal Academy of Music in London and her PhD in composition with Nicola LeFanu at the University of York in the UK. She has participated in various workshops and masterclasses such as Voix Nouvelles (Royaumont) and in Darmstadt where she studied with Brian Ferneyhough, Jonathan Harvey, Theo Loevendie, Tristan Murail and Toshio Hosokawa, as well as the International mastercourse and workshop for conductors and composers with Peter Eötvös and Zsolt Nagy in Herrenhaus Edenkoben.