Complex sentence: In 2006 Jeffrey Nesbitt, the current principal, replaced Dr. Rotoli, who had been principal for the previous 9 years who was promoted to District Director of Instruction & Supervisor of Secondary Education.
Split into simpler sentences: In 2006 Jeffrey Nesbitt, the current principal, replaced Dr. Rotoli, who had been principal for the previous 9 years. Ritoli was promoted to District Director of Instruction & Supervisor of Secondary Education.