Professor Cohen is a Paediatric Surgeon with an interest in Urology. He treats children with a wide range of general paediatric surgical problems including undescended testes, herniae and hydroceles. He treats neonates and children with hydronephrosis, vesicoureteric reflux and urinary tract infections. He is past Head of the Paediatric Surgery Department at the Children s Hospital at Westmead (2004-2015).