Alexander Semyon Vindman is a retired United States Army lieutenant colonel who was the Director of European Affairs for the United States National Security Council (NSC) until he was reassigned on February 7, 2020. In 2023, Vindman was director of the think tank 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.