William Berry serves as the Strategic Advisor to the Chief Medical Officer and as Associate Director of Ariadne Labs. In 2012, together with Atul Gawande, he co-founded the Labs and served as Chief Medical Officer for its first five years. For the last year, he has been the Chief Implementation Officer and created the Implementation Platform. He began working with Dr. Gawande in 2005 and initially served as the Boston Project Director of the WHO Safe Surgery Saves Lives Program. Dr. Berry is a retired cardiothoracic surgeon with interests in patient safety and implementation in healthcare.