Srikant Annavarapu is currently a Principal Mining Engineer at AMEC and President, Master Geotech Services LLC. He has a B.Tech. in Mining Engineering from the Indian Institute of Technology in Kharagpur, India and a Ph.D. in Mining Engineering from the University of Arizona, Tucson. He is a Professional Geological Engineer in the State of Arizona and is a Registered Member of the SME. With nearly 30 years of geotechnical experience within the mining industry, both underground and surface, he has designed surface and underground mining systems at multiple mining locations throughout the world, including block cave mines in Indonesia; sub-level stoping mines in Central America and Nevada; drift-and-fill gold mines in the USA; and blasthole, room-and-pillar, and cut-and-fill mines in India. Dr. Annavarapu has provided ground support and excavation designs for a variety of underground stoping systems and openings in numerous locations within varied geologic settings, and is currently involved in several mine design projects around the world.