Dr Wittal is a Consultant Dermatologist  for The Skin Hospital and specialises in vitiligo and pigmentary skin conditions. Furthermore, Dr Wittal is also a Dermatologist in private practice in Beecroft, a Conjoint Senior Lecturer at the University of New South Wales and a Visiting Medical Officer at Sydney Adventist Hospital, Liverpool Hospital and Bankstown-Lidcome Hospitals.

Dr Wittal is a member of the American Academy of Dermatology, The Australasian Dermtopathology Society, The Australian Medical Association, the Kuring-Gai District Medical Association and an Affiliate Fellow of the Australasian College of Phlebology. As well as this, he is also a Fellow of the Australasian College of Dermatologists.

Dr Wittal specialises in Vitiligo, Pigmentary Disorders and Phototherapy.