That's according to CNN, Ukrinform reports.
Two administration officials say Wolff recently joined the National Security Council to help coordinate the security assistance the US and partners are providing to Ukraine.
Wolff is a retired three-star general and Army armor officer, with experience at the Pentagon, Joint Staff, State Department and the NSC.
Nathan Sales, who served as the US coordinator for counterterrorism at the State Department under then-President Donald Trump, similarly praised Wolff as "an inspired choice for this role."
"After a decades-long career operating at the intersection of diplomacy and war, he's the right person to make sure Ukraine gets the weapons it needs to defeat Russia's bloody war of aggression," Sales said.
The Biden administration is working to get the military assistance to Ukraine as quickly as possible because it believes the war is in a critical stage and the continued US assistance could make a difference when Russia's more aggressive assault on eastern Ukraine ramps up.
