Master Black Belt (MBB) is the highest experience level in Lean Six Sigma. They are program managers, deployment leaders, trainers, coaches and mentors. In fact, MBBs often possess exceptional leadership capabilities and strong analytical abilities. Coupled with a passion for improvements and business transformations, they drive transformational changes. With other words, MBBs also design and implement Lean Six Sigma transformations and programs. Furthermore, they train, coach and mentor numerous project teams at the same time.