Aadne M. Haga is a Partner at Wikborg Rein's Oslo office and heads the firm's Gas Dispute practice. Haga's main practice is 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, most notably Ukrainian Naftogaz in its multi-billion dollar disputes with Gazprom. Haga also regularly advises on the legal framework for physical and financial energy trading in Norway, and the Norwegian legal framework for energy infrastructure. Haga also handles cases relating to the former Soviet Union 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 Ukraine.