Dhananjoy Ghosh is a chemical engineer and visiting faculty at several universities. He graduated with honours in chemistry and obtained his PhD in Petroleum Technology from Calcutta University, India. He was Chief Manager of Operation and Safety at Indian Oil Corporation, India; Head of Process Unit Commissioning, Operation and Safety at Essar Oil, Jamnagar, India; and Head of Refinery Operation, Safety and Maintenance and Marketing Co-ordination at Numaligarh Refinery, India. Subsequently, Dr. Ghosh was a refinery consultant for IRPC, Thailand, under McKinsey Company, Inc., India; The Energy and Resources Institute, India; Haldia Petrochemicals Ltd., India; and ARCL Organics, Kolkata, India. Currently, he provides training on operation and safety at the Indian Institute of Petroleum, Dehradun, India, and in energy sector industries. Dr. Ghosh has published many papers in national and international journals. In 2000, he received the Excellence Award from the National Petroleum Management Programme, Ministry of Petroleum and Natural Gas, India, for his work on the aromatic extraction process in petroleum refineries.