Complex sentence: In Los Angeles, Nicole did record promotions, marketing, and artist repertoire under record mogul, Jheryl Busby and managed R&B recording artist Patrice Rushen's fan club.
Split into simpler sentences: In Los Angeles, Nicole did record promotions, marketing, and artist repertoire under record mogul, Jheryl Busby. Nicole went on to manage R&B recording artist Patrice Rushen's fan club.