National Company of Lignite Oltenia (Romanian: Societatea Naţională a Lignitului Oltenia - SNLO) Târgu Jiu was set up as a commercial society by the Government of Romania in 1997.

The main headquarters of the company is placed in Târgu Jiu, Gorj County.

The company has its material base in Gorj, Vâlcea and Mehedinți with total reserves of 2 billion tonnes of coal.

Around 85% of the total production comes from Gorj County, particularly from the northern areas where coal is extracted near Motru and Rovinari.

The National Company of Lignite Oltenia owns and operates a number of six coal mines located in Gorj, Mehedinți and Vâlcea counties.