Once I have my Green Belt, do I have to involve my company to earn my Black Belt?
No not necessarily. However, the Black Belt project does require a work-related application. If you do not use your company, then you could apply a project if you volunteer for a non-profit and they would be willing to allow you to do a project.
Tracy is a Master Black Belt at GoLeanSixSigma.com, the co-author of The Problem-Solver’s Toolkit and co-host of the Just-in-Time Cafe. She is also a Lean Six Sigma Green Belt Instructor at UC San Diego and teaches in San Diego State University’s Lean Enterprise Program. For almost 20 years, she has helped leading organizations like Washington State, Charles Schwab and GE build problem-solving muscles.