An immunologist is a medical specialist who diagnoses and treats allergic conditions, immune system disorders and asthma, according to About.com. He is also known as an allergist.
The qualifications for an immunologist include completion of a four-year college degree, a four-year course in a medical school, and a three-year residency training in pediatrics or internal medicine, notes About.com. Upon completion of the residency, the aspiring immunologist must pass an exam in his field of residency to acquire the field's board certification. After the certification, the individual may undergo further training to specialize in immunology or allergy. Some of the conditions that immunologists diagnose and treat include eczema, allergic eye diseases, food allergy, medical allergy and chronic sinus infections.