Jonathan Kollek is leaving TNK-BP, the Russian oil producer that accounts for 40 percent of BP Plc (BP/)’s crude production, Kommersant reported, citing people familiar with the situation in the company.

Kollek, the senior vice president for sales, trading and logistics, whose resignation will be officially announced in September, may join Rosneft, the newspaper said.

To contact the reporter on this story: Ilya Arkhipov in Moscow at iarkhipov@bloomberg.net

To contact the editor responsible for this story: Balazs Penz at bpenz@bloomberg.net