Dr Allen is a specialist general paediatrician and paediatric respiratory and sleep physician. He also does general paediatrics and allergy management. He offers services such as allergy testing and pulmonary lung function test. He works with the paediatric sleep study units performing paediatric sleep studies. 

Dr Hugh Allen graduated from the University of Sydney in 1979 and completed his fellowship in 1985 . He has been a fully qualified paediatric sleep physician since 1987 through the Royal Australasian College of Physicians. He has worked both in rural and outback NSW. He is currently a Visiting Medical officer at the Royal North Shore Hospital and has worked there for the last 25 years.