Polski Koncern Naftowy ORLEN, better known as PKN ORLEN is one of Central Europe’s largest refiners of crude oil. ORLEN specializes in processing crude oil into world-class unleaded petrol, diesel, heating oil, and aviation fuel as well as plastics and other petroleum related products.Employing more than 20,000 people, PKN ORLEN operates 7 refineries, of which 3 are located in Poland: Plock, T …[more]