He organized the 2002-2003 Polish winter expedition on K2, which failed to reach the summit. He made another attempt to climb an eight-thousander in the winter by organizing an expedition on Nanga Parbat (2006-2007) but was forced to turn back due to adverse weather conditions. In 2013, he led an expedition to climb Broad Peak in the winter. On 5 March, Adam Bielecki, Artur Małek, Maciej Berbeka and Tomasz Kowalski reached the summit for the first time in history during winter (Berbeka and Kowalski died while descending from the mountain). In 2018, he led another unsuccessful expedition to reach the summit of K2 in the winter.