The meeting included Mike Waltz, the future presidential advisor on national security, and Kit Kellogg, whom Trump has nominated as the special representative for the war in Ukraine.
The source did not provide details about potential negotiations. Ukraine is seeking support from Trump's incoming team in its fight against the ongoing aggression from Russia, the agency notes.
The Wall Street Journal reports that Yermak also met with Suzy Wiles, who will head the White House administration under Trump. Discussions in Washington focused on achieving a lasting peace, as "an unstable, temporary peace does not serve the interests of the U.S. or Ukraine," the publication states.