Chemjong devoted his entire life to studying and documenting various facets of Kirat Limbu tradition and culture at a time when such activities were frowned upon and even punished by the Nepalese ruling elite as being subversive and "anti-national".

In 1928, he completed his certificate level and was about to enroll for a Bachelor degree, when his father, Megbar Singh Chemjong, died.

Chemjong researched Limbu language and culture in Limbuwan, i.e. East Nepal, the neighbouring hill areas of Darjeeling and Sikkim (then an independent Himalayan kingdom) and also in Assam.

In a gesture that went against the grain of prevailing state ideology, King Mahendra invited Chemjong to join Nepal's Tribhuvan University in the capacity of "Limbu expert" in 1961.

King Mahendra of Nepal, recognizing his potential, invited Chemjong to aid in the construction of a cohesive Nepali nationalism.