The entire certification process takes several weeks, based on the type of program you apply for. At the end of each course, you will obtain three certifications: the white, yellow, and green belts. On average, it takes between 1 and 3 months to thoroughly review the course and get the green belt certificate. At that point, you can start new management projects and assemble your own team to coordinate and guide towards success. Getting the Six Sigma Green Belt will offer new opportunities in your career as well as salary leaps.