The author is a practicing independent consultant at M/S Rail Infrasys, Bengaluru. He has been part of several challenging underground metro tunnel and station construction in India and abroad. Additionally, he has served as lecturer in a reputed engineering college for short period. He is currently an advisor to a well-known construction company and presently engaged with NATM tunnel assignment at Kashmir, J&K. Mr. Ananthakumar is an active member of the Institution of Engineers (India), Life member of Indian Society of Technical Education and Associate member of Indian Institution of Technical Arbitration. He can be reached at infra.ak@gmail.com.