No, it is not mandatory to first obtain a Lean White Belt certification before moving on to a higher belt. At Dmaic.com, we offer the flexibility to start with the Lean Green Belt or Lean Black Belt training right away, depending on your preference and experience level. This will allow you to choose the training that best suits your current level of knowledge and your professional development goals. To learn more about our Lean training courses and to determine which level is best for you, we invite you to visit our website or contact us.