These Proceedings of the first and second Tanzanian Oil and Gas Conference and Exhibitions include four plenary and 22 technical papers, all the speeches delivered during the opening and closing ceremonies, list of participants and a list of exhibitors. The presentations were clustered into five sub-themes, namely; Policy, Legal and Institutional Framework; Technology Issues; Capacity Building; Safety and Environment; and Awareness Raising. Highlights of the discussions during the conference were recorded by Rapporteurs and are presented as part of these proceedings. Further, major challenges, lessons and recommendations have been derived from the deliberations and included in the proceedings. As already mentioned, a fully developed follow-up Action Plan has been included as an important outcome of the conference for ensuring sustainable growth of the oil and gas industry for socio-economic development in Tanzania.