Dr. Haider is a professor in the Division of Infectious Diseases of the Department of Medicine at McMaster University. He is also the director at the International Health and Tropical Medicine Clinic, the HIV/HCV Clinic, and the director of research at the Internal Medicine Residency Program.

Dr. Haider earned his medical degree with distinction at the University of Saskatchewan before going on to numerous specializations in internal medicine and infectious diseases at the Royal College of Physicians Surgeons of Canada and the American Board of Internal Medicine.

His research interests include infections in immunocompromised hosts such as HIV, cancer patients, bone marrow transplant patients, and tropical medicine. He has conducted studies on novel antiretroviral therapy in naïve and experienced HIV patients, studies on novel antifungal therapies in neutropenic hosts, and more.

He is a co-investigator for CTN 264, which is investigating the relationship between access to food for people co-infected with HIV and HCV and behavioural outcomes, and CTN 222, which is examining the reasons for more rapid progression of liver disease in people co-infected with HIV and HCV. He has contributed to several CTN research publications.