PT Petrosea Tbk is an Indonesian based firm which is engaged in multi-disciplinary mining, infrastructure, and oil & gas services. The company operates in three business segments namely; Contract Mining segment which provides a wide range of project services like open pit contract mining, civil and infrastructure construction, including roads, tailing dams and technical Services as well as mine planning and optimization, which contributes as a major part of overall revenue; Engineering and Construction segment provides dedicated design and estimating services; and Services segment.