KYIV, Nov 13 - Yuriy Vitrenko at the post of executive director of Naftogaz Ukrayiny will focus on the arbitration process with Gazprom, including the enforcement of the transit case decision and negotiations on the future transit contract, Naftogaz has said.

He will also coordinate the project on solving the problem of sustainable development of Ukrnafta and the marketing research and analysis division of Naftogaz.

The post of chief operating officer will remain vacant until the introduction of a new operating model.