Adam Pengilly first competed in an international race in November 2002. At the America's Cup race in Lake Placid , he finished second behind Brian McDonald . In 2004 he won the bronze medal at the British Championships . At the 2004 European Skeleton Championships in Altenberg , he came in 13th place. Things went better at the next European Championship, where he finished fifth in the same place. He also won the silver medal at the British Championships. Meanwhile, Pengilly made his debut in the Skeleton World Cup in November 2004 . In a race in Altenberg he came in 21st place. He was among the top ten for the first time at the pre-Olympic race in Turin. There he was ninth in 2005.
At the Universiade in 2005, Pengilly won the silver medal behind Christopher Hedquist . He then started at his first Skeleton World Championship in Calgary 15. He also won silver at the British Championships in 2005 behind Kristan Bromley , and in 2006 Pengilly won the title. The highlight of the season was Pengilly's participation in the 2006 Olympic Games in Turin , where he finished eighth. The post-Olympic season 2006/07 was particularly successful. In Nagano , Park City and Cesana he finished fifth, as well as in the overall ranking of the World Cup. The athlete came ninth at the World Championships in St. Moritz and seventh at the European Championships in Königssee . In the 2007/08 season he reached third place in Cesana for the first time a podium place in the World Cup, at the parallel European Championship he won bronze. He finished fifth in the overall World Cup ranking. At the World Championships in Altenberg , he was tenth. In the 2008/09 season he started first in the World Cup , later in the European Cup and finally in the Intercontinental Cup , where he won a race. At the World Championships in Lake Placid , he won silver.