What jobs would sickle cell anemia prevent you from being able to work?

No specific jobs...: Would be contraindicated, short of being a sherpa or other high altitude guide. There are even professional athletes with sickling disorders. Maintain your health through care and surveillance by a comprehensive care clinic staffed by experts. Flexibility from your employer may be necessary as well, given the unpredictable onset of acute sequelae. Avoid school absence in preparing for your career.

Additional info: Sickle cell disease and sometimes trait prevent the patient from being an airline or military pilot. Otherwise most careers that do not involve high altitude would probably be fine, as the other doctor had written.