Conductor Yun Sung Chang majored composition at College of Music, Seoul National University and completed the concentration in conductor course at the graduate school. During the study at the University of Music and Performing Arts, Vienna, Austria, he won the second prize in conductor at the 1st International Prokofiev Competition held in St. Petersburg, Russia in 1993. He also won the second prize without a first prize winner at the International Conductor Competition held in Tokyo, Japan in 1997.

He conducted many internationally renowned orchestras including St. Petersburg Philharmony, Pt. Petersburg Symphony, and Camerata St. Petersburg of Russia, Tokyo Symphony, Osaka Philharmony, and Sendai Philharmony of Japan, Wiener Concert Verein and Klagenfurt Symphony of Austria, Robert Schumann Philharmonic Orchestra Chemnitz and Nuremberg Symphony of Germany, Rome Symphony of Italy, Orquesta Clasica Santa Cecilia Madrid of Spain, MAV Symphony Orchestra of Hungary, Prague Radio Symphony Orchestra, Prague Symphony, Bruno Symphony, and, Janacek Philharmonic of Czech, Krakow Radio Symphony of Poland, Kharkov Symphony of Ukraine, and Belgrade Symphony of Serbia.

In addition, he conducted the performance tour of four cities in Germany with Nuremberg Symphony of Germany, Japan tour of KBS Symphony, Korean tour of Mariinsky Opera Orchestra and Camerata St. Petersburg of Russia, Austria’s Klagenfurt and St. Poelten tour of Bruno Philharmonic Orchestra and Janacek Philharmonic of Czech, ballet performances of Universal Ballet at UK’s Sadlers Wells Theatre, US’s Lyric Opera of Chicago, and Canada’s Vancouver Queen Elizabeth Theatre, Tokyo and Osaka tour of Seoul Metropolitan Opera, etc. ranging from symphony and ballet music to opera.

In 1995, he had the first European performance of "Korea", Krzysztof Penderecki’s Symphony No.5, in Krakow, Poland, the first Korean performance of "Gurre-Lieder" of Schoenberg, Symphony No. 2 of Alfredo Casella, Symphony in C-sharp minor by Ernest Bloch, etc. and, many other first performances of compositions of Korean composers, actively working with a broad range of repertoire from classic to moder and contemporary.

He is also making lots of performances as opera conductor. Starting from the conducting of Mozart <L’Oca del Cairo>, he conducted <Marriage of Figaro>, <Don Giovanni>, <Così fan tutte>, and <The Magic Flute> of Mozart, <The Bill of Marriage> and <The Barber of Seville> of Rossini, <Hansel and Gretel> of Humperdinck, <L’elisir d’amore> of Donizetti, <Rigoletto>, <La traviata>, <La forza del destino>, and <Nabucco> of Verdi, <Il Trittico>, <Madama Butterfly>, <La bohème> and <Tosca> of Puccini, <Carmen> of Bizet, <A Midsummer Night’s Dream> of Britten, and <Jeanne d’Arc au bûcher> of Honegger.

He took up the positions such as full-time conductor of Osaka College Opera House of Japan, standing conductor of Ulsan Municipal Symphony, standing conductor of Changwon Municipal Symphony, standing conductor of Daejeon Municipal Symphony, full-time conductor of Gunpo Prime Phil, etc. He produced a record disk in the label of Japan’s Camerata. Currently, he works as professor in conductor major at the Dept. of Composition, College of Music, Seoul National University and Seoul & Vienna Art Director at Soli Deo Gloria Music Association. He took the office of the third standing conductor of Bucheon Philharmonic Orchestra in June 2021.