Complex sentence: He played an important role in developing house music (an electronic, disco-influenced dance music) as a Chicago DJ in the 1980s and he helped to popularize house music in the 1990s, with his work as a producer and remixer.
Split into simpler sentences: He played an important role in developing house music (an electronic style of dance music) as a Chicago DJ in the 1980s. As well, he helped to popularize house music in the 1990s, with his work as a producer and remixer.