Aadne M. Haga is a Partner at Wikborg Rein's Oslo office and is head of the firm's Petroleum/Energy practice. Haga's main focus of his practice has been assistance to buyers of natural gas, and he has successfully advised and/or represented a number of buyers of natural gas in international negotiations and international arbitration. Haga also regularly advises on the legal framework for physical and financial energy trading, including emissions trading, in Norway, and the Norwegian legal framework for energy infrastructure. Haga also handles Russia-related cases and has studied Russian and Serbo-Croatian. Haga has previously worked for the Norwegian Ministry of Foreign Affairs in Russia and for the Norwegian Armed Forces on the Balkans and in the Ukraine.