Dr. Raina is presently the technical advisor to Gov't of Bahrain for the Bahrain - Qatar Causeway Bridge. Earlier he was Operational Advisor and independent Consultant to various Consulting organizations in the fields of Bridges, Contract Management and Contracts, and prior to that he was Senior Expert and Consultant to the United Nations and the World Bank in many countries for many years. He headed the United Nations Team of Experts in Saudi Arabia for the multi-billion dollar extensive roads network development and maintenance program in the country. (Detailed description about the Author inside).