- Alexander Semyon Vindman (born Aleksandr Semyonovich Vindman, June 6, 1975) is a retired United States Army lieutenant colonel who was the Director for European Affairs for the United States National Security Council (NSC) until he was reassigned on February 7, 2020. Vindman is currently director for a think tank named the Institute for Informed American Leadership (IIAL). Vindman came to national attention in October 2019 when he testified before the United States Congress regarding the Trump–Ukraine scandal. His testimony provided evidence that resulted in a charge of abuse of power in the first impeachment of Donald Trump.