Mr Greg o'Toole is a Consultant Plastic and Reconstructive Surgeon based at the Royal Free Hospital in London. He is the co-lead of the world-renowned Ear Reconstruction Service, which provides treatment to patients with congenital and traumatic deformities of the ear. This department is the largest in Europe for treating microtia in both adults and children, and its surgical reconstruction results are among the best in the world.

Mr O'Toole trained in Oxford and Sydney before completing his Royal College of Surgeons Plastic Surgery qualification (FRCS Plast). Following this, he undertook a two-year fellowship in Paris and was awarded a Doctorate of Medicine (MD) for his research into the use of gene therapy in surgery.

He introduced the 'EarStitch' procedure for prominent ear correction surgery and performs up to 200 EarFold and EarStitch procedures per year. He also performs earlobe reductions and revision otoplasty. Mr O'Toole is actively involved in research, and his work has been widely published in medical literature. He is often invited to speak at conferences worldwide and also lectures trainee doctors in plastic surgery.

Mr O'Toole is also involved in philanthropic activities. He frequently travels to underprivileged communities in India, the Polynesian Islands, and Cambodia to operate on patients who would otherwise be unable to afford treatment. He worked as an assistant surgeon in Thailand and Malaysia in the 1990s.

He is a full member of the British Association of Plastic Surgeons (BAPRAS) and a founding member of the International Society of Ear Reconstruction (ISAR). He is also a fellow of the European Board of Plastic Surgeons (EBOPRAS) and is on the UK Specialist Register for Plastic Surgery.

In 2012, Mr O'Toole was included in The Times list of international experts for his work in plastic surgery. He has also appeared as a specialist on "Embarrassing Bodies" on Channel 4 and on "The One Show" on BBC1.

Diseases, Medical Tests and Treatments
- Microtia surgery
- EarFold
- EarStitch
- Earlobe reduction
- Revision ear surgery
- Otoplasty
- Ear surgery