Alexander V. Marchenko, whose practice focuses primarily on upstream oil and gas, mining, and metals, advises clients throughout their corporate transactions. A native Russian speaker who also is fluent in English, Alexander counsels clients throughout Russia and the Central Asian and Caspian countries on onshore and offshore acquisitions and divestitures of exploration and production assets, including financing and parent guarantees; due diligence investigations; negotiating relevant sale-and-purchase; and amendment and reissuance of exploration and production licenses.