Md. Rajjab Sharif started his business career in 1972 as a medicine whole seller. In 1976 he established "Shamim Drug House" which was dealing with Import of specialized medicines. He started business in Melamine Sector in the year 1982 which is now leading and No. 1 Melamine Industry in the country. He is regarded as the pioneer in melamine industry. Being a visionary leader, he has expanded his business in Melamine, Pharmaceuticals, Housing, Financial institution etc. He has been holding CIP status since 1990.