In May 2002, Sharp summited the 8,200 m (26,903 ft) Cho Oyu with Jamie McGuinness and Tsering Pande Bhote. Cho Oyu is the sixth highest peak in the world and is near Mount Everest. The leader of the Cho Oyu expedition, impressed with Sharp's strength, acclimatization abilities, and rock climbing talent, invited him to join an expedition to Everest the next year.
In 2002, Sharp went on an expedition to Cho Oyu, an 8,201 m (26,906 ft) peak in the Himalayas, with a group led by Richard Dougan and McGuinness of the Himalayan Project. They did make it to the summit, but one member died from falling into a crevasse; this opened up a slot on the group's trip to Everest the next year. Dougan regarded Sharp as a strong climber, but noted that he was tall and skinny, possessing a light frame with little body fat; in cold-weather mountaineering, body fat can be critical to survival.
McGuinness was part of an expedition that successfully climbed Cho Oyu with Sharp in 2002. He also was on the 2003 expedition to Mount Everest with Sharp and other climbers, and in 2006 offered Sharp the opportunity to climb Everest with his organized expedition for little more than what he ultimately paid Asian Trekking, which Sharp declined as he wanted to climb Everest independently. In the documentary Dying For Everest, McGuiness noted that Sharp did not expect to be rescued ... "absolutely not, he was clear to me that he understood the risks and he did not want to endanger anyone else".