The main headquarters of the company is placed in Petroşani, the principal city in the coal mining region of Hunedoara County's Jiu Valley.
Located south and east of the city of Petroşani, the Parâng mountains form the eastern barrier of the Jiu Valley (a plateau 100 kilometers long from east to west and 70-80 kilometers wide from north to south).
He returned subsequently to Romania, where he worked for some time in the mining district of the Jiu Valley.
The mountains, located north of Romania's Jiu Valley, are primarily characterized as a highland with meadows and pastures, with very large forested area throughout the surrounding 1,200-1,400 metres high mountains.
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On November 15, 2008, 12 miners died after two explosions at a mine in Petrila, one of six coal mining cities in the Jiu Valley region of Hunedoara County, Romania.