In 1948, Nandu Jayal went to Switzerland and acquired a Ski Teacher's Certificate, a very respectable achievement. He was appointed Chief Instructor at the Winter Warfare School, later known as the High Altitude and Winter Warfare School. Under the leadership of the Engineer-in-Chief, Maj. Gen. Harold 'Bill' Williams, himself an eager climber, Nandu Jayal organised the first Sappers expedition to Bandarpunch successfully in 1950. As a young Captain in 1950-51, he carried out a strategic reconnaissance of the Garhwal Himalayas and was later the Indian Army liaison officer for the French Expedition to Nanda Devi in 1951. He organised and led two expeditions to Kamet; the first in 1952 when the summit team was forced back by a blizzard from just 600 metres short of the mountain and later in 1955 when he summitted - at that point of time, it was the highest that an Indian had climbed.