Staff A-Z

We have a passionate and committed staff dedicated to caring for the children at Great Ormond Street Hospital. To find out more about a member of staff, their clinical specialty or to contact them, please use the search below.

Debbie Sell

Dr Debbie Sell is a Senior Research Fellow in the Centre for Outcomes and Experience Research in Children’s Health, Illness and Disability (ORCHID), and is a Speech and Language Therapist.

Jan Marek

Professor Jan Marek is a Consultant Cardiologist with expertise in paediatric and prenatal cardiology and cardiovascular imaging. He has been working at Great Ormond Street Hospital (GOSH) since 2005.

Helen Cross

Professor Helen Cross is The Prince of Wales’s Chair of Childhood Epilepsy and Head of the Developmental Neuroscience Programme at UCL-Great Ormond Street Institute of Child Health, Honorary Consultant in Paediatric Neurology Great Ormond Street Hospital for Children NHS Foundation Trust, London and Young Epilepsy, Lingfield, UK.