[7] Although the duo failed in their attempt but in October 2017 Sirbaz successfully summited Nanga Parbat becoming the first to climb the mountain in autumn season.
In May 2019, Sirbaz became the first Pakistani to successfully summit the 8,516-metre (27,940-foot) high Mount Lhotse – the world’s 4th highest mountain - without using supplementary oxygen.
[8] In July 2019, Sirbaz climbed the summit of the 8,047-metre (26,401 ft) Broad Peak mountain in Pakistan, without using supplementary oxygen.
[10] In April 2021, Sirbaz and Muhammad Abdul Joshi became the first Pakistanis to scale the 8,091-metre Annapurna peak in Nepal, the 10th highest mountain in the world.
[20] Later in October 2023, Sirbaz Khan and Naila Kiani called off their attempted ascent of Shishapangma peak in Tibet, after surviving an avalanche near its summit.