Vadim Son will become CFO of Volga Gas Plc, the company working in Russia’s Volga region said April 13. Effective that day, Tony Alves resigned as CFO.

Son’s position as CFO will be a non-board member role. Since September, Son has worked with Volga in Saratov as the finance director of its operating subsidiaries.

Alves, who has been CFO since 2009, will remain on the board until Volga’s annual general meeting on June 10; then he will become a consultant for Volga.