Dr Mangar is a Consultant Clinical Oncologist and Honorary Senior Lecturer at Imperial College Healthcare, London. He leads clinical trials in prostate and lung cancer, and has a particular interest in cancer prevention stategies.

Dr Mangar has written and had published many papers which are listed in more detail in his CV page.

Dr Mangar is able to provide medical reports and opinions on all aspects of oncology (including late effects of radiation and chemotherapy) and has a proven track record in clinical negligence claims and as an Expert Witness.