Complex sentence: Brian spent the next few years as a session drummer, recording with Freedy Johnston and working with Ben Folds, while joining the faculty at NYC's Drummers Collective, where he remained for the next thirteen years.
Split into simpler sentences: Brian spent the next few years as a session drummer, recording with Freedy Johnston and working with Ben Folds. He also joined the faculty at NYC's Drummers Collective, where he remained for the next thirteen years.