Peter trained as a general surgeon at Auckland Medical School, New Zealand, before serving as a missionary doctor in Kenya. He served with the Christian Medical Fellowship UK for 27 years and is now Chief Executive of the International Christian Medical & Dental Association (ICMDA).
His current work involves leadership training, teaching evangelism and ethics, medical mission, writing, editing and media work. He is a council member of the Evangelical Alliance and the chair of the End of Life Care for Europe group. He and his wife Kirsty live in St Albans, UK, they have three sons and one grandchild.