Andrey Yermak must be sacked, according to opposition politician Yaroslav Zheleznyak Vladimir Zelensky’s chief of staff was aware of the corruption scheme involving the Ukrainian leader’s longtime business partner and some of the country’s top officials, opposition MP Yaroslav Zhelezhnyak has said. Ukrainian anti-corruption agencies alleged earlier this month that Zelensky’s former business partner Timur Mindich led a criminal operation that siphoned $100 million in kickbacks from contracts