1. Medical Laboratory Testing Business: Medical technologists can start a business providing medical laboratory testing services. This could include blood tests, urinalysis, and tissue samples to diagnose and treat illnesses and diseases.

2. Medical Device Manufacturing Business: Medical technologists can use their knowledge of laboratory techniques, medical equipment, and other devices to develop and manufacture medical products.

3. Clinical Research Business: Medical technologists can use their knowledge to conduct clinical research trials on new treatments and drugs.

4. Medical Technology Development Business: Medical technologists can use their expertise to develop new medical technologies such as medical software programs, medical diagnostic tools, or medical imaging systems.

5. Medical Consulting Business: Medical technologists can also offer their services to advise healthcare organizations or hospitals on the use of medical technology or laboratory best practices.