Ukrainian President Volodymyr Zelensky has named spy chief Kyrylo Budanov as his new chief of staff, just over a month after his previous top aide resigned in a corruption row.”At this time, Ukraine needs greater focus on security issues,” Zelensky said in a social media post, alongside a photo of his meeting with Gen Budanov in Kyiv.The 39-year-old has until now led the Hur military intelligence, which has claimed a number of highly effective strikes against Russia.Zelensky also said he intended to replace his defence minister Denys Shmyhal, appointing his current minister of digital transformation Mykhaylo Fedorov to take up the post.Budanov’s predecessor, Andriy Yermak, wielded enormous political influence throughout Russia’s full-scale invasion, which began in 2022. He also led Ukraine’s negotiating team in crucial talks with the US aimed at ending the war.Zelensky wrote on Friday: “At this time, Ukraine needs greater focus on security issues, the development of the defence and security forces of Ukraine, as well as on the diplomatic track of negotiations. “Kyrylo has specialist experience in these areas and sufficient strength to deliver results.” The president added that he had already instructed his new office chief to update and present key documents regarding “the strategic foundations” of Ukraine’s defence.The chief of presidential staff in Ukraine is historically a very powerful position. There was a time in the 2000s when a presidential administration head in Ukraine wielded about as much power as the president himself.Ostensibly administrative, the role traditionally offered not just close access to the head of state, but also plentif …