SUMO Coal - The International Resource JournalJan 10, 2010 . Based in Middleburg, Londani is currently actively mining in the area and plays a key role in the Sumo strategy as the company spans from . “We would like to become an international coal mining company, which is why we.duties of hr at sumo coal mining company,Sumo Coal Limited | LinkedInSome of the company's subsidiaries are in drilling and exploration, coal mining, beneficiating and marketing companies. Sumo owns a coal preparation plant for.
duties of hr at sumo coal mining company