Still was involved in many organisations that helped promote his work. He was the Chairman of the Medical Committee at King's, a part of the Society for Waifs and Strays, and the National Association for the Prevention of Infant Mortality for twenty years.
He was actively engaged in various organizations that supported his endeavors, holding leadership roles such as Chairman of the Medical Committee at King's Hospital, membership in the Society for Waifs and Strays, and a position within the National Association for the Prevention of Infant Mortality for twenty years.