Rangachar Narayana Iyengar also known as RNI is a civil engineer. He was with the Indian Institute of Science, Bangalore for about four decades. He has been the director of Central Building Research Institute, Roorkee (1994–2000). He is currently a Raja Ramanna Fellow, Editor of ‘SADHANA’ published by the Indian Academy of Sciences, Bangalore, and the Director for the Center for Ancient History and Culture (CAHC) at the Jain University, Bangalore.
He is a fellow of Indian Academy of Sciences, Indian National Academy of Engineering and National Academy of Sciences, India. He is the recipient of the Sir M Visvesvaraya award (Government of Karnataka 1996) for senior scientists for lifetime contributions to science and technology. He has been a consultant to various industries and research & development organizations in India including NPC, IGCAR, DRDO, RDSO, BHEL and Kerala State Government.