Dujmovits began climbing in the Himalaya and Karakorum in the 1990s, starting with successful ascents of Dhaulagiri I (1990), Mount Everest (1992), K2 (1994), Cho Oyu (1995), and Shisha Pangma (1997). He began to attract attention from the wider public in 1999, when his climb of the Eiger's north wall in Switzerland was publicized as a 33-hour-long live television broadcast. Dujmovits went on to summit Broad Peak (1999) and Gasherbrum II (2000), but it was not until he climbed Nanga Parbat in 2001 that he decided to attempt to climb all fourteen mountains in the world higher than 8000 metres (eight-thousanders). In 2004, he climbed Annapurna I and Gasherbrum I within a two-month period, followed by ascents of Shisha Pangma (2005), Kangchenjunga (2006), Manaslu (2007), Broad Peak (2007), and Makalu (2008). On 20 May 2009, Dujmovits climbed Lhotse—his final 8000-metre peak—with his former wife Gerlinde Kaltenbrunner, Hirotaka Takeuchi and David Göttler. This made Dujmovits the 16th person to climb all 14 eight-thousanders, and the first German person to do so.