Besides its Petroleum and Lubricant business, NBE is also a Mine Contractor. NBE operates as an IUP-JP company with the number 20/I/IUJP/PMDN/2019

NBE is the sole contractor of  CV Kara Elmas Madenleri and PT Arsy Nusantara, both operating in Central Kalimantan and manages all infrastructure and production activities to produce reliable and quality coal.