SILT was originally formed as SILT Consultants in the year 1979 and is the first Nepalese privately registered firm specialized in geo-technical investigation and materials testing. SILT was converted into the private limited company in the year 1981. The establishment of the company took place during the time when consulting business had just started in the country. SILT, therefore, takes pride to be one of the pioneering firms in the development of Consulting Industry in Nepal. Gradually, the increase in the scope of consulting services in various development sectors lead to the realization of multidisciplinary approach and thus SILT began with the diversification of consulting services into various fields of engineering, agriculture, rural development, environmental studies, social and economic studies, community development/gender studies.