Tim Macartney-Snape (born 5 January 1956) is a mountaineer and author. On 3 October 1984 Macartney-Snape and Greg Mortimer were the first Australians to reach the summit of Mount Everest. They reached the summit, climbing without supplementary oxygen, via a new route on the North Face (North Face to Norton Couloir). In 1990, Macartney-Snape became the first person to walk and climb from sea level to the top of Mount Everest. Macartney-Snape is also the co-founder of the Sea to Summit range of outdoor and adventure gear and accessories, a guide for adventure travel company World Expeditions and a founding director and patron of the World Transformation Movement.