Or Bachelor's degree in chemistry or human biological science plus Certificate in Medical laboratory Science (MLS), Clinical Laboratory Science (CLS), Medical Technology (MT), as recognized by the National Accrediting Agency for Clinical Laboratory Sciences (NAACLS) is required. Today, our employees are located at our three major campuses in Phoenix/Scottsdale, Arizona, Jacksonville, Florida, Rochester, Minnesota, and at Mayo Clinic Health System campuses throughout Midwestern communities, and at our international locations.